Longines Factory waterproof stems for caliber 428, set of 2 - new in package

Set of 2 Longines factory MALE waterproof stems for caliber 428 and perhaps other as well, new in package. See images for further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. If you need a part for a Swiss watch I likely have it so feel free to inquire. Images do a pretty good job of representing the item.