I'm just wondering if it has a barrel lug for the ejector rod...
Ditto, but the OP's statement that the barrel rollmark reads .38 S&W SPL.
- rather than .38 S&W SPECIAL CTG.
or .38 S&W CTG.
- suggests that the barrel is 2" original factory length.
Of course, all we can do is assume, considering that the OP hasn't checked back in yet...