No such model number.
The Model 16 was not made in 38 Special.
Smith&Wesson model 14
Need a detailed description of all markings. No such sn for the Model 38
No such model.
No
You can, but, you should not. The frame is not rated for +P
Your smith and Wesson model 64-3 was made from 1977-1987.
Model 37
That model number does not appear in any references I have seen.
50-250 USD
smith&wesson model 19-6
22LR