Yes, I had one of these, and it is in the Shea Beaver book. One of these you show was also offered to me in 1999 and I should have bought it, too.
These brown caps were around in the 1970s, albeit in small numbers.
The triad picture is from Whamond's site, and I think I appended it to the war relics site.
Bob Coleman can speak to these. I owned the cap and the field blouse, but then got rid of them all....
On the other hand, I have accumulated, as have you, more black foetid woolens and share them here.
The stamp can also be washed out, as your cap has been well used.
Note: image not my cap. Downloaded ca. 2007
Last edited by Friedrich-Berthold; 04-23-2016 at 03:58 AM.