Indian Motorcycle Original OEM Sidecar Bracket.NOS.I believe this unit to be for a Military Model 741.It measures 2 3/4" Tall and is about 3" Wide.The cup size is for 1 1/2" frame pipe.Now even tho this bracket is NOS,I see some rust thru out from sitting in the bottom of one of my boxes,(see pics).As always,Please look at all pics so you know condition,(see all pics).Good luck bidding.Thanks for looking.