BESTFIT Mainspring 610K for ETA 900, 1080, Benrus BA, BB, CE, CK, Enicar 410 - Alloy

BESTFIT Mainspring 610K for ETA caliber 900, 1080, Enicar 410, Benrus BA, BB, CE, CK, Reconvelier 2321 and Gruen 445 plus perhaps similar ébauche watches, white alloy, new in possibly frail envelope. 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 marginally adequate job of representing the item.