Gruen Factory stem for caliber 710 RSS - new in envelope

GRUEN factory stem for caliber 710 RSS (R signifies Incabloc, SS is Sweep Second), new in sealed envelope. Stem may not be pristine but is new and unused. 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 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.