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You are here: Home / Movements / Excelsior Park JB1

Excelsior Park JB1

Last Update: October 6, 2022

Brand:Excelsior Park
Family:
Excelsior Park JB1 Family
Height:6.8 mm
Jewels:7
Reserve: hours
Frequency:18,000 A/h, 36,000 A/h
Winding:Hand winding
Diameter:40.0 mm (18 ligne)
  Complications:5-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph
Hands:30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand
Distinguishing Technical Characteristics
Hand-Winding
Counter-Clockwise Balance Cock
5-Column Chronograph
Balance at 3:00
Barrel at 7:30
Production:  – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
1/10 second Cal. JB1 stopwatch

Cal. JB1 from Excelsior Park was an 18 ligne stopwatch movement produced in the 1920s. The crown is used for winding and can house a co-axial button in addition to the button at 11 (with the crown at 12). Excelsior Park made standard, rattrapante (Cal. JB11), and addition timing versions of Cal. JB1. A high-beat (36,000 A/h) version was also produced, with a 30-second dial. Internal documents show the movement called “Cal. B” and that it was available in 20 and 22 ligne versions in addition to 18 ligne.

One notable feature of Cal. JB1 is the distinctive J-shaped barrel bridge, a signature of the Jeanneret family of Saint-Imier. It also includes the Jeanneret spare parts compartment embedded in the movement next to the balance.

1912 Jeanneret-Brehm Cal. JB1 advertisement

Excelsior Park introduced Cal. JB1 by the 1910s, with it appearing in a 1912 advertisement. Notably, this advertisement features the distinctive J-shaped bridge making up the “J” in Jeanneret-Brehm. The logo and movement are marked with patent number 3364, which was issued in 1891 and applied to the predecessor movements produced by Jeanneret-Brehm. It remains listed in the 1950 Excelsior Park catalog, though it was outdated by this point. Still, it is listed as a “first quality” movement compared to the Roskopf stopwatch movements also offered.

Cal. JB1 stopwatches used the “Excelsior” brand before the company took that name.

This 1928 ad shows Excelsior Park’s Cal. 1, the spare parts compartment, and variations on the movement.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.

Ranfft Pink Pages

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