The coat Dean picks up in Bobby's basement when he escapes the panic room and runs away to find Zachariah...is the same coat that 2014!Dean wore in The End (5x04)!!
I know it's hard to see in the second cap, but trust me - it's the same coat.
I think that's really neat. Right now I'm calling it the Green Military Utility Coat of Doom, but maybe I should call it Dean's Coat of Bad Decisions...or feel free to offer suggestions :-P
These are the only two times this coat has appeared (so far)