Patek Philippe open face chronograph pocket watch

Technical characteristics

Type

Chronograph & split-seconds watch

Calibre

Manual, cal. 17"

Material

18k yellow gold

Sale Date

March 5th, 1925

Dimensions

45mm diameter

Case Number

408'866

Place recorded

Switzerland

Movement Number

156'854

Production Year

1901

Maker / attribution

Patek Philippe

Design

Visible features

• White enamel dial featuring painted black Breguet-style Arabic numerals and blued steel hands. • Vertically aligned subsidiary counters: 30-minute register at 12 o'clock and running seconds at 6 o'clock. • Winding crown fitted with a coaxial chronograph pusher beneath an oval bow bearing a stamped hallmark. • Slide lock bolt situated on the bezel/case band near 11 o'clock. • Dial signed 'PATEK, PHILIPPE & CIE GENEVA, SWITZERLAND' across the center and 'FAB. SUISSE' at 6 o'clock.

Dial and Indication

The timepiece features a white enamel dial with black Breguet-style Arabic hour numerals, paired with blued steel hands and an outer 1/5-second graduation for the chronograph function. Chronograph minutes are tracked on a 30-minute subsidiary register positioned at 12 o'clock, counterbalanced by a running seconds subdial at 6 o'clock. The dial is lettered across the center as 'PATEK, PHILIPPE & CIE GENEVA, SWITZERLAND', with 'FAB. SUISSE' placed along the edge at 6 o'clock. Visible elements in the photograph conform to this two-register vertical layout, while internal mechanism and case components remain obscured.

Case and Chronograph Operation

Constructed in 18k yellow gold with a catalogued diameter of 45 mm, the open-face case houses a monopusher chronograph system. Operating controls are centered around the pendant, where the winding crown integrates a single central pusher beneath an oval bow bearing a stamped hallmark. A locking slide bolt is positioned along the band and bezel near 11 o'clock to secure the chronograph mechanism against unintended actuation. The catalog records the case as number 408'866.

Reported Movement and Archival Documentation

According to the auction catalog, the watch is powered by a manual-wind 17-ligne caliber bearing movement number 156'854. While the catalog specifies that the case, cuvette, dial, and movement are signed, the movement, inner cuvette, and interior case back are not shown in the available single photograph. Dating and commercial history rely on documentation cited by the seller, specifically an Extract from the Archives confirming the piece was manufactured in 1901 and subsequently sold on March 5th, 1925.

Identification

Serial number

408'866

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.