Hi - I have an oversized snaffle bridle and I can't figure out what brand it is. It seems to be of good quality, and there is a 'brand' on the browband of an unusual shape with what appears to be a "D" with a smaller "H" inside the "D".
You would be better off asking in Off Course.
Closest thing to a sauna around here would be tarping over a few cows, hold a bucket of water & light a match.
I had a bridle like this - made in England, Harry Dabbs.