Welcome! Agree with the above - the 2" probably lost any barrel stampings when it was shortened (likely from 5"), but the right barrel of the 4" may have either .38 S & W CTG (the standard British service round) or .38 S & W Special CTG (US service) there. Both have replacement front sights, stocks and lanyard rings removed, and appear refinished.

If a .38 Special seats flush in the cylinder (especially if the barrel is not stamped .38 Special), it has likely been modified as noted above. The case is of smaller diameter than the .38 S & W and will swell or bulge with firing; it may even crack. Hope this is helpful.

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Alan
SWCA LM 2023, SWHF 220