Jaeger LeCoultre® calibre # 838 balance staff - for shock protected device Fits calibers: 838, 839 Brown 40 mm are tempered and

40 mm are tempered and ready for use

calibres: 28

Overall length is 5-1/2" (140mm)

400 Day Clock Suspension Unit 39 can be identified in the Horolovar 400- Day Repair Guide

PERRIN End Cutter this end cutter features a regular edge

Jaeger LeCoultre® calibre # 838 balance staff - for shock protected device Fits calibers: 838, 839 Brown 40 mm are tempered andJaeger LeCoultre balance staff for shock protected device, part # 727, calibre # 838 balance staff for shock protected device to fit Jaeger LeCoultre calibres: 838, 839 *Perrin Supply Ltd is independent of and not affiliated with or sponsored by Jaeger LeCoultre. Jaeger LeCoultre warranty does not apply to parts supplied byPerrin Supply Ltd. Using generic parts may devalue your watch.