GUNMIKE
.38 M&P with a serial number in the C74xxx range would have been ready to ship in the first half of 1949. Whether it actually went out the door in that period is another question altogether.
Best guess is January to April, 1949. Only a letter can provide certainty.
For what it's worth, all the K frame revolvers had five frame screws until sometime in 1956.
The heavier wear on the right stock panel is from the gun having been carried in a hip holster on the right side for a prolonged period of time.