{"product_id":"zenith-el-primero-chronomaster-guilloche-dial-box-and-papers-ref-01-0240-410","title":"Zenith El Primero Chronomaster Guilloche Dial - Box and papers (Ref. 01.0240.410)","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003ch1\u003e\u003cspan class=\"s1\"\u003eWorth A Read\u003c\/span\u003e\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ch3 data-start=\"1047\" data-end=\"1075\"\u003eHistory and Significance\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/h3\u003e\n\u003cp data-end=\"422\" data-start=\"55\"\u003eThe El Primero is one of the most important automatic chronograph movements ever made, introduced in 1969 and still in use today in evolved form. It was one of the first high-beat automatic chronographs, running at 36,000 vibrations per hour, which allows for greater precision and a smoother sweep of the chronograph hand.\u003c\/p\u003e\n\u003cp data-end=\"729\" data-start=\"424\"\u003eThe Chronomaster line takes that technical foundation and presents it in a more classical format. References like the 01.0240.410 lean into traditional watchmaking cues with a more detailed dial, calendar functions, and a case design that feels closer to mid-century chronographs than modern sport pieces.\u003c\/p\u003e\n\u003cp data-end=\"1043\" data-start=\"731\"\u003eThis particular configuration stands out because of the dial. The guilloché work adds depth across the entire surface, breaking up what could otherwise be a busy layout. Between the triple calendar, moonphase, and chronograph registers, there is a lot going on, but the dial manages to stay legible and balanced.\u003c\/p\u003e\n\u003ch3 data-start=\"2167\" data-end=\"2184\"\u003eWriter's Thoughts\u003c\/h3\u003e\n\u003cp data-end=\"1312\" data-start=\"1120\"\u003eThe guilloché dial El Primero is the one to own. A classic triple calendar moonphase with a chronograph brings serious value for those looking for complication movements. The complete set pair with the condition makes this one truly stand out. The El Primero is a movement everyone should own at least once, and this example is a great choice.\u003c\/p\u003e\n\u003ch3 data-start=\"2167\" data-end=\"2184\"\u003eOur Promise\u003c\/h3\u003e\n\u003cp data-end=\"2262\" data-start=\"2024\"\u003eEvery watch is thoroughly vetted, carefully described with complete transparency, and guaranteed authentic. Each piece is offered in honest condition, ensuring collectors receive a timepiece that reflects both originality and integrity.\u003c\/p\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp\u003e\u003cstrong data-end=\"1935\" data-start=\"1925\"\u003eBrand:\u003c\/strong\u003e Zenith\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"1957\" data-start=\"1947\"\u003eModel:\u003c\/strong\u003e El Primero Chronomaster (Ref. 01.0240.410)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2014\" data-start=\"2005\"\u003eYear:\u003c\/strong\u003e circa 2000s\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2049\" data-start=\"2031\"\u003eCase Material:\u003c\/strong\u003e Stainless steel\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2084\" data-start=\"2070\"\u003eCase Size:\u003c\/strong\u003e 40mm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2104\" data-start=\"2094\"\u003eBezel:\u003c\/strong\u003e Smooth stainless steel bezel with tachymeter scale\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2169\" data-start=\"2160\"\u003eDial:\u003c\/strong\u003e Silver guilloché dial with triple calendar, moonphase, and chronograph registers\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2268\" data-start=\"2255\"\u003eMovement:\u003c\/strong\u003e Automatic Zenith El Primero caliber\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2328\" data-start=\"2309\"\u003eStrap\/Bracelet:\u003c\/strong\u003e Leather strap\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2364\" data-start=\"2347\"\u003eBuckle\/Clasp:\u003c\/strong\u003e Zenith buckle\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2396\" data-start=\"2383\"\u003eContents:\u003c\/strong\u003e Complete set with box and papers\u003c\/p\u003e\n\u003ch1\u003eCondition\u003c\/h1\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-3\" dir=\"auto\" data-message-id=\"a7758fbb-9610-47eb-90a2-09e81c78fce6\" data-message-author-role=\"assistant\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69b37331-b3ec-832b-9dd7-e354558c83a1-1\" data-testid=\"conversation-turn-92\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"a391b9cc-4f05-40c9-8227-90cd67bee221\" dir=\"auto\" data-message-model-slug=\"gpt-5-3\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:fae374db-d0fa-4a88-8d31-89d913f712b4-0\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:fae374db-d0fa-4a88-8d31-89d913f712b4-0\" data-testid=\"conversation-turn-2\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"3781aeb1-806e-4192-8630-780175c8d936\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cp\u003e\u003cstrong data-end=\"2460\" data-start=\"2451\"\u003eCase:\u003c\/strong\u003e Shows light wear consistent with use, maintaining a strong overall shape.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2551\" data-start=\"2542\"\u003eDial:\u003c\/strong\u003e The guilloché dial is clean and well-preserved, with no wear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2633\" data-start=\"2623\"\u003eHands:\u003c\/strong\u003e Hands are original and in excellent condition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2697\" data-start=\"2685\"\u003eCrystal:\u003c\/strong\u003e Crystal shows no signs of wear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"2758\" data-start=\"2739\"\u003eStrap\/Bracelet:\u003c\/strong\u003e Strap is new.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Zenith","offers":[{"title":"Default Title","offer_id":48244919730359,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/8391\/6727\/files\/DSF6418.jpg?v=1777326956","url":"https:\/\/huntingtoncompany.com\/products\/zenith-el-primero-chronomaster-guilloche-dial-box-and-papers-ref-01-0240-410","provider":"Huntington Company","version":"1.0","type":"link"}