SEE OUR COMPLETE VINTAGE GRUEN PARTS SECTION: New Old Stock vintage Gruen watch treasure that came out of an old watchmaker's estate - he specialized in Gruen in the 1940s, 50s and 60s, and mostly stocked just the best Swiss Made Gruen parts. I am listing several rare Gruen Swiss Made watch cases and dials. We have other Gruen items with dozens of NOS gems being listed each week. Watch our weekly auctions for more Gruen vintage items. In the coming weeks, we will be auctioning off several other styles of NOS vintage Gruen watch bands, NOS cases, dials, display boxes, crowns, and many rare spare parts for vintage Gruen watches mostly NOS items from the 1940s, 50s and 60s. Bid with confidence from a seller with more than 17,000 positive feedbacks and history on EBAY since 1998.