There are 2 possiblities for your Smith and Wesson revolver.You could have a .32 double action which was made between 1909-1919,or you could have the 32 hand ejector series third model which was made from 1911-1942 with the serial number that you have provided.
When was 38 smith and Wesson serial number 172095
Your serial number was used by Smith and Wesson for the models 10,12,13,45,64,65,547.It dates this serial number to the year 1979.
Smith and Wesson is the make.
Standard Catalog of Smith and Wesson
You will need to add the model of Smith and Wesson to your serial number to get the correct year of manufacture.
K 7981 smith&wesson
No such serial number in Smith and Wesson data.
Your serial number indicates that your Smith and Wesson model 18 was made in the year 1962.
With the serial number that you have supplied,your Smith and Wesson model 15 was made in the year 1950.
Your serial number indicates that your Smith and Wesson 38 special was made in the Year 1960.
Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.
No serial number given.