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The Encyclopedia of Horology

Wristwatch · Digital jump hour wristwatch

Swiss nickel digital jump hour wristwatch

Partially verified

This circa 1930 Swiss manual-winding digital jump hour wristwatch is housed in a 40mm nickel case fitted with a snap-on back. The front features a silvered dial surface displaying time via three aperture windows arranged vertically for jumping hours, minutes, and subsidiary seconds discs. Attached via fixed-style wire lugs, the timepiece is paired with a black leather strap secured by a stainless steel buckle.

Front view of the nickel digital jump hour wristwatch showing three digital apertures and black leather strap
Front view of the nickel digital jump hour wristwatch showing three digital apertures and black leather strap — Bonhams. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bonhams.com
Category
Wristwatch · Digital jump hour wristwatch
Maker / attribution
Not established
Reference
Not recorded
Catalogue / lot identifier
825
Source-reported date
Circa 1930
Country
Switzerland
Source-reported serial
120906 24

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Dial Configuration and Display

The timepiece employs a digital jump hour display configuration described in auction documentation as having a silvered dial surface. Rather than traditional hands, the front displays numeric readings visible through apertures.

Observation of the front shows three distinct apertures arranged on the metal facade revealing digits for hours, minutes, and seconds. The auction house dates the piece to circa 1930.

Evidence for this section
  • “Dial: Silvered”
  • “SWISS | JUMP HOUR, A NICKEL DIGITAL JUMP HOUR WRISTWATCH, CIRCA 1930”
  • “Three distinct apertures on the metal front show digits for hours, minutes, and seconds.”

Case Structure and Fittings

The watch features a 40mm nickel case equipped with a snap-on back. Direct observation shows a circular nickel case with visible metal wear and patina along its outer edges, accompanied by a small fluted winding crown situated at the 3 o'clock position.

The timepiece is fitted with a black leather strap displaying an embossed reptile texture, which is fastened by a stainless steel buckle.

Evidence for this section
  • “Case: 40mm, nickel with snap back”
  • “Strap: Leather with stainless steel buckle”
  • “Prominent circular nickel case displays metal wear and patina along the outer edges.”
  • “Fitted with a black leather strap with embossed reptile texture and a small fluted winding crown at 3 o'clock.”

Movement and Cataloguing Scope

Auction specifications list the movement as a manual-winding calibre, with the case identified by the number 120906 24. The item is described under a general Swiss designation without a named manufacturer or specific calibre reference.

Internal components, mechanical movement architecture, and case interior markings are not illustrated or recorded in the source documentation.

Evidence for this section
  • “Calibre: Manual winding”
  • “Case No: 120906 24”
  • “SWISS | JUMP HOUR, A NICKEL DIGITAL JUMP HOUR WRISTWATCH, CIRCA 1930”

Open research questions

  • What specific calibre or movement maker manufactured the manual-winding jump hour mechanism?
  • What stamps, hallmarks, or patent numbers are present inside the snap-on case back?
  • What material (e.g., painted metal, celluloid) was used for the internal jumping hour and minute discs?

Source evidence

Recorded claims and source quotations for Swiss nickel digital jump hour wristwatch
FieldSource-reported valueSource quotation
Case material and size40mm, nickel with snap back“Case: 40mm, nickel with snap back”
Calibre typeManual winding“Calibre: Manual winding”
DialSilvered“Dial: Silvered”
Case Number120906 24“Case No: 120906 24”
StrapLeather with stainless steel buckle“Strap: Leather with stainless steel buckle”
ProvenanceProperty of a Japanese Collector“Property of a Japanese Collector”
Auction ResultHK$6,375 including premium“Sold for HK$6,375 inc. premium”
Sale Date and Location1 December 2021, Hong Kong“Hong Kong Watches 1 December 2021, 14:30 HKT Hong Kong, Six Pacific Place”

Visible details

  • Three distinct apertures on the metal front show digits for hours, minutes, and seconds.
  • Prominent circular nickel case displays metal wear and patina along the outer edges.
  • Fitted with a black leather strap with embossed reptile texture and a small fluted winding crown at 3 o'clock.

Research qualifications

  • No movement or case back interior views are provided in the listing.
  • Specific manufacturer is unidentified beyond the generic Swiss origin designation.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Bonhams : SWISS | JUMP HOUR, A NICKEL DIGITAL JUMP HOUR WRISTWATCH, CIRCA 1930

Reviewed 2026-10-21 · Record 2628bc2cb9

Terms in this record

Glossary explanations for terms named in this object’s record.