by CollectinSteve Wed Jun 05, 2013 7:35 pm
Definitely Czech. No question about it, unless the Czechs were making stuff for the Norwegian Army back in the 1960s

Check the text below the picture:
http://www.camocollectables.com/products/203-sap-task-force-t-shirt.aspx
Czech items at the time were sized 1, 2, and 3 (I don't think there was a 4). A and B were used to designate long and short (forget which is which).
I took a quick check and so far I haven't found a need for a Size 1. But if you're looking to part with it I'll look harder. I know I've got a stash of these coats around somewhere!
Steve