Thanks to everyone for their replays. They are very helpful.
The XIV Corps acorn appears to be hand cut.
I'd say that this cap is one notch up quality-wise from the forage caps that I buy for use in my classroom, which are themselves just one notch up from the ones you can buy at roadside tourist traps. Attached is the only other identifying tag that I could find. It's on the inside of the cap, beneath what appears to be a clear plastic sleeve for a name card, which I assume is normal for reenacting.
The frock coat that the cap was with is for an enlisted rank, and was white trim, that may have faded from light blue over the years. There is no tag whatsoever on the coast, and some of the cuts are pretty rough, so I'm guessing that it's home made. Is it normal for coats from the big sutlers to come with manufacturer's tags?
Thanks again!
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