Early Prototype Ploprof Cal.1000 Movements

w154 · Jul 16, 2026

Stumbled on these a year or two ago. From everything I can gather they’re most likely from Ploprof development due to the split-stem evident on some of them, and the 00002xxx serial numbers match known prototypes. Just wish there had been cases, dials, and hands too !

Jonezy13 · Mon. 2:49pm

cool find - can I ask how you know they are from the PloProf and where you found them?

bertmuller · Mon. 3:58pm

w154
Stumbled on these a year or two ago. From everything I can gather they’re most likely from Ploprof development due to the split-stem evident on some of them, and the 00002xxx serial numbers match known prototypes. Just wish there had been cases, dials, and hands too !

The date dial look like they from a Ploprof as they are the right off set for the crown set up ❤️

w154 · Mon. 4:21pm

Jonezy13
cool find - can I ask how you know they are from the PloProf and where you found them?

I don’t know for sure that they are, but there are clues like the split stem and the alignment of the date wheel relative to the crown. They came from a high-end watchmakers estate via a reseller.

Early Prototype Ploprof Cal.1000 Movements

w154

Jonezy13

bertmuller

w154

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