The model 29-2 started production in 1961, thought the barrel length was reduced from 6.5" to 6" in 1979. Based on the serial number, yours was manufactured between 1977-1978.
When was 38 smith and Wesson serial number 172095
1980.
That serial number requires a call to S&W
Your Smith and Wesson model 19 was made in the year 1978 by the serial number that you have supplied.
1969
@ 61
1974
@1972
75-76
1958
Need the serial number
@ 1980