Marco Mainspring #2877 for 17 ligne Bulova 17M, 17CT - Steel

Marco Mainspring No. 2877 for 17 ligne Bulova caliber 17M, 17CT, Helbros caliber 92H movements and likely several other Swiss Pocket Watches such as Park R3364 and some Unitas and Moeris watches, steel, 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.