BOREL Mainspring 2026-M for Bulova 8AN, Gruen 723, Certina 173 - Alloy

BOREL Mainspring 2026-M for Font caliber 1146, Bulova caliber 8AN, Gruen caliber 723 and Certina caliber 173 movements and perhaps others, alloy, 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.