Gruen Factory stem for 16L caliber 716, 717 - new in envelope

Gruen factory stem for 16 ligne caliber 716, 717 Pocket Watch movements and perhaps others, new in envelope. 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 marginally adequate job of representing the item.