BESTFIT Mainspring 165Z for Unitas 429 and 16s Waltham B-16 - Alloy

BESTFIT Mainspring 165Z for Unitas 429, 429N, tongue end, white alloy, new in envelope. plus perhaps similar ébauche watches, white alloy. Also used in Swiss made Waltham B-16 grade movements based on the Unitas caliber 429. See images for precise mainspring s[specifications. I likely have several of these so the one you get may differ slightly from the images. 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.