BESTFIT Mainspring WV100 for Vulcain caliber 406 Wrist Alarm - Alloy

BESTFIT Mainspring WV100 for Vulcain caliber 406 Wrist Alarm, white alloy, new in envelope. This is the ALARM side mainspring, not the Time side. See images for precise mainspring 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.