Marco Mainspring #3365 for LeCoultre Alarm TIME Caliber 489 - Steel

Marco steel mainspring #3365 for LeCoultre caliber 489 alarm movement, new in envelope. this is the TIME side mainspring, the time side uses a different one. See images for precise mainspring specifications. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.