Old verses new?
Old = "NO LOCK" and a forged hammer as well as trigger.
NEW= Two piece barrel, UNNEEDED LOCK and MIM hammer and trigger.
You make your pick and spend your money.
As for me ,I don't want any locks or mim parts on my guns.
I'd pay more for an older S&W .
Infact, I have zero intrest in S&W revolvers with the locks.