you will need to shake or swing the watch from 800 to 2
400 Day Fork #1 is a long one prong fork for 400 Day Suspension Units
and the minute hand has a square hole 2
These round plastic crystals are very thin and used for Hunting Case type pocket watches
Mido® Crown CN-MID-05 model number 603
Jaeger LeCoultre® calibre # 9OL balance staff - 277-68-34-30 hairspring collet 34 Fits calibers: 460, 490, 491, 9OL, 9OLN GP Series Miyota you will need to shakeJaeger LeCoultre balance staff 277 68 34 30 hairspring collet 34, part # 723 1, calibre # 9OL balance staff 277 68 34 30 hairspring collet 34 to fit Jaeger LeCoultre calibres: 9OL, 9OLN, 460, 490, 491 *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.