Jim, I think you're correct about RD92. The colouration of my 'St. Swithin' is very similar to your Moustache, but nowhere near as nice.
Did you get yours as a seedling in 1984, also?
The dorsal is lovely, but I like the shiny "nose" in the second photo. The
pouch on most multis always look like a nose to me. Your plant has a very
nice one.