PM Mainspring No.88 for AS caliber 1045 & 1103 - ONYX Steel

PM ONYX steel mainspring No.88 for A.S. caliber 1045 & 1103 movements and quite likely others, new in envelope. 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.