Hard to find, single US Army 21st Tank Battalion distinctive unit insignia (DUI) "Strenus Et Audacter", with minor wear to finish and one broken pin. No hallmark, comes with a clutch, not shown.
 
741st Tank Battalion was an independent tank battalion that landed on the eastern side of OMAHA beach in support of the 1st Infantry Division, famously losing the majority of their Duplex Drive (DD) tanks at sea when they were launched from their landing craft in rough sea conditions.