Nutmeg Curling Club, Bridgeport, CT
Nutmeg Women Curlers
Lots of variants of this pin.  Standard-sized pin with three dimensional nut projecting above top of pin vs slightly smaller pin with flat nut ending at top of pin shown.  There are also pins with a convex curved body and pins with a space between the bottom of the nut and the banner.
Error pin?
Morten & Ole Svendsen collection. Pins and Pin History
This pin wanted

David Cobb collection
8 of this pin were made as part of a competition to be the "official" 50th Anniversary pin.  The pin at the right end of row three won.
Dave Phillips collection
What is the history of this pin?
Dave Phillips collection

Joel Dietz collection