Ship date on a model 15

[M18386pounder]

I hope I'm asking in the fight place. I just bought a model 15 38 special. I was wondering about the ship date. The serial number is K 355xxx. Can anyone look thus up for me please? Thank you.

 

[s3dcor]

By the book it looks to be 1959.

 

[DWalt]

I show one having a SN a few thousand lower which shipped in March 1959. So maybe mid-1959 for yours.