Mike, here are a few that I do not think are on your list.
18037
18319
21762
28028
28102
FT44
18037
18319
21762
28028
28102
FT44
I believe mine is 25257 but I'll confirm when I get home.
Could that be determined by a "letter" from Ruger?and the fifth gun is 11185 which would seem to be pretty early for a 7-1/2", but this gun does have a 7-1/2" non-INC barrel on it... perhaps it went back to the factory and was reshipped like a couple other early .44 flattops that are known like that.
Chet15
Is the BKH-47 model a 7 1/2" Flattop Blackhawk only or our the 6 1/2" models the same model number.
Maybe.Could that be determined by a "letter" from Ruger?