This appears to be a vintage US Army military ring from the 1940s-50s, during World War II (WW2). It also has the inscription "REG.U.S. PAT. OFF.", which is an abbreviation for "Registered in the U.S. Patent and Trademark Office." Made of sterling silver. Size: Approximately size 19 (Japan) I've tried to set a price that's easy to purchase, but please feel free to contact me if you have any questions. Thank you.