I’ve never seen a 239 with forward slide serrations. Is that original ?

Good eye, I never noticed that.... I've got to go see where it is hidden in the house and look at it further.

I looked it up in my 'book' this is the only one I bought new... from a member on another forum. The pistol is a tactical model that came with a threaded barrel, short reset. And is was new, never fired... still wrapped in the plastic bag in the box and dry as a bone. I put a regular barrel on it and like all the others: Crimson Trace Laser Grips.