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The Encyclopedia of Horology

Pocket watch · Chronograph pocket watch

Excelsior Park Chronograph Pocket Watch, c.1950

Partially verified

This is an open-face chronograph pocket watch produced in Switzerland by Excelsior Park around 1950. The seller states that the watch measures 51 mm in diameter excluding the stem and loop, encased in chromium-plated metal with an acrylic crystal. According to the seller, it is powered by a stem-winding Excelsior Park calibre JB CH500 movement featuring a spare parts compartment enclosed by an inner cuvette. The white dial is signed 'EXCELSIOR PARK' and 'SWISS MADE', displaying stylized black Arabic numerals, an outer seconds track with red five-minute markers, a 30-minute register below 12 o'clock, and a constant seconds register above 6 o'clock.

Front view of Excelsior Park chronograph pocket watch on acrylic stand
Front view of Excelsior Park chronograph pocket watch on acrylic stand — The Vintage Wrist Watch Company. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.antiques-atlas.com
Category
Pocket watch · Chronograph pocket watch
Maker / attribution
Excelsior Park
Reference
Not recorded
Catalogue / lot identifier
as170a12230
Source-reported date
c. 1950
Country
Switzerland

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 and Display Configuration

The open-face pocket watch features a white dial signed 'EXCELSIOR PARK' and 'SWISS MADE'. The display uses stylized, italicized black Arabic hour numerals bordered by an outer perimeter track with red Arabic numerals marking five-minute intervals.

The chronograph layout incorporates two vertically aligned subsidiary dials: a 30-minute elapsed time counter at 12 o'clock and a running constant seconds subdial at 6 o'clock. The dial is protected by an acrylic lens.

Evidence for this section
  • “White dial signed 'EXCELSIOR PARK' and 'SWISS MADE'.”
  • “Italicized black Arabic numerals with an outer track demarcated with red Arabic numbers at five-unit intervals.”
  • “Two subsidiary seconds dials, one for constant seconds and the other to record up to 30 minutes.”
  • “The acrylic lens is in good condition, just minor marking if you look very closely.”

Case Construction and Exterior Details

The watch is cased in polished chromium-plated metal measuring 51 mm in diameter, excluding the winding stem and loop. The winding crown is positioned at 12 o'clock and houses an integrated coaxial chronograph pusher, flanked by an attached suspension bow.

The seller reports surface marking to the case back. Additionally, the listing notes that the inside of the case back displays watchmaker service references, though internal surfaces are not shown in the available photographs.

Evidence for this section
  • “The watch measures 51mm diameter excluding the winding stem and the loop.”
  • “The case is chromium plated and has some surface marking to the back but not too detrimental.”
  • “Polished chromium-plated metal case with winding crown at 12 o'clock containing a coaxial chronograph pusher and attached suspension bow.”
  • “The inside of the case back has a list of service references, this watch appears to have been very well maintained which suggests it was used in a situation where accuracy was important.”

Reported Movement and Internal Features

The listing states that the pocket watch is powered by a stem-winding Excelsior Park calibre JB CH500 movement, where 'JB' denotes company founder Jeanneret-Brehm.

According to the seller description, the movement incorporates an internal spare parts compartment and is shielded by an inner cuvette cover. Because no internal images of the movement or cuvette are provided, these reported features cannot be independently verified from the visual record.

Evidence for this section
  • “The watch has a calibre JB (Jeanneret-Brehm, founder of Excelsior Park) CH500 stem-winding movement which is working nicely.”
  • “The movement is complete with the spare parts compartment, and it is all protected by an inner cover.”

Attribution and Source Context

The watch is attributed to circa 1950 by the seller, and origin is recorded as Swiss. The listing also mentions that this model was utilized by the Swedish military; however, no military issue marks or provenance documentation are detailed for this specific individual piece.

The seller describes the dial as having its original finish and notes general workshop assessment parameters, though technical timing-machine results are not recorded in the listing.

Evidence for this section
  • “Excelsior Park chronograph pocket watch , c1950.”
  • “Origin Swiss”
  • “Indeed, this same model of chronograph was used by the Swedish military.”
  • “The signed dial is in its original finish and it is in beautiful condition.”

Open research questions

  • What specific serial or reference numbers are stamped on the movement or inside the case back?
  • What specific watchmaker dates or marks comprise the service references noted on the inside of the case back?
  • Does the exterior case back bear any specific military inventory or issue engravings?

Source evidence

Recorded claims and source quotations for Excelsior Park Chronograph Pocket Watch, c.1950
FieldSource-reported valueSource quotation
Movement Calibrecalibre JB CH500“calibre JB (Jeanneret-Brehm, founder of Excelsior Park) CH500 stem-winding movement”
Case Diameter51mm“The watch measures 51mm diameter excluding the winding stem and the loop.”
Case MaterialChromium plated“The case is chromium plated”
LensAcrylic“The acrylic lens is in good condition”
OriginSwiss“Origin Swiss”
Inner Protective CoverPresent“it is all protected by an inner cover”
Movement Spare Parts StorageCompartment included“The movement is complete with the spare parts compartment”
PackagingNew presentation box“The watch comes in a new presentation box.”

Visible details

  • White dial signed 'EXCELSIOR PARK' and 'SWISS MADE'.
  • Italicized black Arabic numerals with an outer track demarcated with red Arabic numbers at five-unit intervals.
  • Dual subsidiary dials configured vertically at 12 o'clock (30-minute recorder) and 6 o'clock (constant seconds).
  • Polished chromium-plated metal case with winding crown at 12 o'clock containing a coaxial chronograph pusher and attached suspension bow.

Research qualifications

  • Movement calibre JB CH500 and internal spare parts compartment cannot be directly verified as the case back and movement are not shown in the image.
  • Claimed original dial finish and case back service markings rely entirely on seller documentation.

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

Consulted source

Antiques Atlas - Excelsior Park Chronograph Pocket Watch, C1950 as170a12230

Reviewed 2026-10-21 · Record 6fa356456b

Terms in this record

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

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