Jean-Marie, I have a 20B for a 11 2. I've checked the 1945, 1948, 1952 and 1955 Shooter's Bible, but they don't have a chart. The later Shooter's Bibles only have charts with 3 numbers. Neither holster was in the 1945 or 1948 book.
I tried my Detective Special in mine. It sort of fit, but it didn't instill confidence.
Both the 20 and 22 were made for autos and revolvers.
The search goes on.