This auction is for 1 silver-colored, Gruen-signed vintage wristwatch winding crown. This is a vintage Gruen crown that is 1/10 10K rhodium signed GRUEN. Dustproof type of crown with the collar tube. From the 1960s/70s. The 1 crown you get in this auction has these specs: 4.6mm in diameter; 2.3mm deep; and tap size 10. This crown is NOT for a Gruen Curvex model. Please read the spec sheet shown in the picture that came with the kit; it includes all the dimension data on the crown you may need or ask your watchmaker to confirm this is the correct part. PLEASE NOTE: There are no returns or exchanges on this item. Also, we do not have any other Gruen crown sizes in stock other than what is presently listed on EBAY. The crown came out of the rare Gruen dealer's kit shown in the pictures, which is from a watchmaker's estate that we purchased. The handwriting at the bottom of the spec sheet indicates the order is from December 1966! He specialized in Gruens in the 1940s, 1950s and 1960s. These are suitable crowns for many Gruen watch models. Buy with confidence: Check our feedback of more than 17,000 positives and history on EBAY since 1998..