Someone help me date a pre-war M&P 38, please...

[redleg155]

No photos yet, sorry.  My photo hosting site is "unavailable" for now. 
 
Just made an interesting discovery at a local shop and the price seemed right so got a new toy.  This is a pre-war .38, nickel, 5" gun that has only one tiny spot of freckling on the backstrap, zero holster wear, original and clearly numbered wood diamond grips and mechanically near new - all numbers match too.  Does not appear to have been shot but maybe a cylinder full.  Serial number is 337xxx
 
Looking for a date, but am without my references for a bit.
 
Thanks - redleg

[redleg155]

Photos - but not that good.
 
Condition, in my opinion is quite high.  Only wear is a slight cylinder turn line.  No muzzle wear at all.
 
 

[hounddoug]

it looks like my mod 10  mine is a 1955. but that is a very nice gun you got there. its in very good shape.

[S.B.]

Late 40s to early 50s, my guess? I can't remember when they discontinued the 5 screw guns. What's the serial number?
Steve