Smith and Wesson 21 64 leather holster

1970’s with some basket weave and bird stamping detail small hole where river is missing? Size "64" is supposed to fit J frames or similar size revolvers with a 4 inch barrel though some seem to run a little large and fit K frames better. The first digit in the size number is the frame size ( 6=J, 3=K, 2=N) and the second digit is the barrel length....of course there are exceptions model 10-6 38special with 4 inch barrel fits like it was made for it