OLD USN UNITED STATES NAVY. H HAMBURGER STERLING HAT PIN. Marked on Strap: VIKING HILBORNE HAMBURGER, INC. NEW YORK MFR’S. Marked on back of pin: STERLING + 1/20 10K. Another little pin on the strap is marked B & W Co. PAT 01923–it looks like there is only one of these pins in the photos, but there are two. Measures approximately: 2.25″ x 2″ at wingspan. Track Page Views With. Auctiva’s FREE Counter.