Not to hijack the thread, but I've had a related question for a while. I have had an old Canadian forces khaki tam for years, which I only picked up because it fit me. If there were a civilian cap badge or nothing on it would it raise eyebrows? It sounds like maybe not, but I'm most likely to run Canadians if I was wearing it.
I also have one of those BW SD. I wore it for awhile until I found out what it was and quit that. I had others.
"There is no merit in being wet and/or cold and sartorial elegance take second place to common sense." Jock Scot
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