Jaeger LeCoultre® calibre # 8NR stem spring Fits calibers: 402, 427, 496, 8NR, 8RF, 8RFO spandrels part # 721

part # 721

mainspring number 1720

curved top (12 to 6) mineral crystal

RL1063 RL 1063 Ronda Slimtech Quartz Movement is a 3 hand (hour/minute/sweep second) movement

stem is at the 3 o'clock position

Jaeger LeCoultre® calibre # 8NR stem spring Fits calibers: 402, 427, 496, 8NR, 8RF, 8RFO spandrels part # 721Jaeger LeCoultre stem spring, part # 447, calibre # 8NR stem spring to fit Jaeger LeCoultre calibres: 402, 427, 496, 8NR, 8RF, 8RFO *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.