Need the serial number.
With the serial number that you have provided,your Smith and Wesson K-38 was made in the year 1956.
@ 1957
Your Smith and Wesson model K-38 with the serial number K180570,indicates that it was made in the year 1953.The serial number range for that year was K-175638 thru K-210095.
@60
@ 53
1963
The Smith & Wesson revolver with serial number K 241205 was manufactured in 1956. This serial number falls within the range of the Model 10 revolvers produced during that time. Smith & Wesson typically used a letter prefix to identify the manufacturing year, and the "K" prefix indicates it is a K-frame revolver from that period.
The serial number K 533800 indicates that your Smith and Wesson was made in the year 1963.This was assigned to the models 14,15,16,17,18,19,48,53,66,67,68 and there pre model variations.
The letter K prefix to your serial number was assigned to revolvers made by Smith and Wesson from 1946-1970.These were given to the models 14,15,16,17,18,19,48,53,66,67,68.It should be noted that all K prefix frames were target frame revolvers.Your serial number indicates that your Smith and Wesson handgun was made in the year 1964.
K 7981 smith&wesson
1963
Shipped from the factory @ 1966