bibelot Forum Supporter Joined Nov 25, 2016 Messages 1,620 Location Avoca,NY Apr 21, 2018 #1 At first I thought button then screw shank reminds me of a piece for trumpet valve key ?
Bayoutalker Elite Member Joined Sep 30, 2012 Messages 3,048 Location Highlands, TX Apr 21, 2018 #2 My dad had some of those from WWII from his uniform. I don't know where they were used though. Cliff
Gauntlet Forum Supporter Joined Oct 12, 2011 Messages 4,070 Location South of Graceland Apr 21, 2018 #3 https://metaldetectingforum.com/showthread.php?t=232678
Charlie Tuna Elite Member Joined Jun 20, 2011 Messages 696 Location Colorado Apr 29, 2018 #4 Not specifically a button, it was used to hold the chin strap on a visor cap.