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Zenith El Primero Chronomaster Guilloche Dial - Box and papers (Ref. 01.0240.410)

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Worth A Read

History and Significance

The 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.

The 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.

This 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.

Writer's Thoughts

The 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.

Our Promise

Every 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.

Specifications

Brand: Zenith

Model: El Primero Chronomaster (Ref. 01.0240.410)

Year: circa 2000s

Case Material: Stainless steel

Case Size: 40mm

Bezel: Smooth stainless steel bezel with tachymeter scale

Dial: Silver guilloché dial with triple calendar, moonphase, and chronograph registers

Movement: Automatic Zenith El Primero caliber

Strap/Bracelet: Leather strap

Buckle/Clasp: Zenith buckle

Contents: Complete set with box and papers

Condition

Case: Shows light wear consistent with use, maintaining a strong overall shape.

Dial: The guilloché dial is clean and well-preserved, with no wear.

Hands: Hands are original and in excellent condition.

Crystal: Crystal shows no signs of wear.

Strap/Bracelet: Strap is new.

Zenith El Primero Chronomaster Guilloche Dial - Box and papers (Ref. 01.0240.410)

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Worth A Read

History and Significance

The 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.

The 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.

This 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.

Writer's Thoughts

The 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.

Our Promise

Every 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.

Specifications

Brand: Zenith

Model: El Primero Chronomaster (Ref. 01.0240.410)

Year: circa 2000s

Case Material: Stainless steel

Case Size: 40mm

Bezel: Smooth stainless steel bezel with tachymeter scale

Dial: Silver guilloché dial with triple calendar, moonphase, and chronograph registers

Movement: Automatic Zenith El Primero caliber

Strap/Bracelet: Leather strap

Buckle/Clasp: Zenith buckle

Contents: Complete set with box and papers

Condition

Case: Shows light wear consistent with use, maintaining a strong overall shape.

Dial: The guilloché dial is clean and well-preserved, with no wear.

Hands: Hands are original and in excellent condition.

Crystal: Crystal shows no signs of wear.

Strap/Bracelet: Strap is new.