Seal Ring found on the early 406/416 Water pumps.
Part # A0003371380
Part # 0109972447
Part # 0059971145
Part # 915035000006
Diagram # 051
Part # 4043320059
Diagram # 307
Part # 4049970046
Diagram # 240
Part # 014997684764
Part # N007603022405
Part # 0159972247