1930s Anonymous Swiss Jump Hour Black Lacquer Case (Ref. 1775)

History and Significance

Few vintage watches are more interesting than the ones that arrive with a mystery attached. This 1930s Swiss jump hour has spent decades associated with Rolex, including an auction appearance in 1989 where it was cataloged as a Rolex reference 1775. The case is engraved 1775, and an interior RWCo marking has also helped fuel that attribution. Those details make the Rolex connection understandable, but they do not make it definitive.

The problem is that the evidence becomes less convincing once the watch is examined beyond those markings. There is no confirmation that Rolex produced a reference 1775 jump hour in this configuration, and there is similarly no established evidence connecting Rolex to nickel-plated cases of this type. Most importantly, the movement itself is unsigned. Although RWCo can immediately bring Rolex Watch Co. to mind, initials alone are not enough to establish authorship, particularly during an era populated by countless small Swiss manufacturers, assemblers, and case makers.

A more conservative interpretation is that RWCo belonged to another manufacturer whose history has largely disappeared. Countless Swiss watch companies operated during the first half of the twentieth century, and many left behind little documentation after closing. That possibility is less glamorous than assigning a Rolex signature to the watch, but it also makes the object more intriguing. The surviving watch becomes evidence of a company and period that may no longer have a neat historical record.

The watch itself hardly needs the Rolex attribution to be compelling. Jumping-hour displays were a wonderfully unconventional expression of Art Deco watchmaking, replacing traditional hour hands with a numerical aperture and turning the act of telling time into something mechanical and graphic. The elongated case suits that approach beautifully, while the black lacquer inlay across the top surface adds a decorative element that immediately situates it within the period's design language. At 25mm by 38mm, the proportions give the watch substantial presence despite its narrow width.

Most importantly, the mystery has followed this particular watch for decades. Its 1989 auction appearance as a Rolex reference 1775 demonstrates that the attribution is not a recent attempt to manufacture a story around an anonymous watch. Whether that earlier identification was based on lost information or simply the same RWCo and 1775 markings remains impossible to establish from the available evidence. What survives today is a beautifully unusual Swiss jump hour with a genuinely fascinating history, recently serviced and running properly, with enough unanswered questions to make it more interesting rather than less.

Writer’s Thoughts

The best way to approach this watch is to resist the temptation to make the story cleaner than the evidence allows. Calling it a Rolex would certainly make the headline more exciting, but the uncertainty is actually the most compelling part. The reference 1775 engraving, RWCo marking, and 1989 auction attribution provide legitimate grounds for the historical association, while the unsigned movement and lack of corroborating Rolex documentation provide equally valid grounds for caution. That tension gives the watch a story that another definitively signed example simply would not have.

The design is strong enough to stand entirely on its own. The jumping-hour display, long Art Deco case, and black lacquer inlay create an object that feels much more architectural than a conventional 1930s wristwatch. The fresh service makes the mechanical side of the experience equally satisfying. Rolex or not, this is an impressive surviving Swiss jump hour from an era when watchmakers were willing to experiment with how a wristwatch could look and display time.

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.

Brand: Anonymous Swiss

Model: Jump Hour

Reference: 1775 case engraving, attribution unconfirmed

Year: 1930s

Case Material: Nickel-plated

Case Size: 25mm x 38mm

Dial: Three-disk jump-hour display with black lacquer case inlay on case

Movement: Unsigned Swiss manual-wind jump-hour movement, recently serviced

Strap/Buckle: Generic leather strap

Buckle/Clasp: Generic buckle

Contents: Watch only