Jaeger LeCoultre® calibre # 840 mounted block for escape wheel - upper and lower knives using a 381 battery with

using a 381 battery with hand dimensions 150/90/20 (hour/minute/small seconds)

317 or T350006456

32 teeth on the wheel

Color identified heads for quick selection

Jaeger LeCoultre® calibre # 840 mounted block for escape wheel - upper and lower knives using a 381 battery withJaeger LeCoultre mounted block for escape wheel upper and lower, part # 3925, calibre # 840 mounted block for escape wheel upper and lower to fit Jaeger LeCoultre calibres: 840 *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.