Need the serial number.
GunBroker.com
Wood
crimson trace grips for smith and wesson 39
Best left to a gunmsith.
Ask a gunsmith for assistance.
chec at: midwayusa.com
Loosen the grip screws.
CHeck with the maker of the grip.
Take it to a gunsmith
On revolvers, they are usually on the butt. They MAY be concealed by the grips.
Need a sn to date it.
take the grips off