Hi. I also have a 1959 Model 14. I personally feel that the era of the 4 screw K frame might be the pinnacle of S&W revolver quality (whether K frame or not.)

Mine had factory target diamond grips, but they were unoriginal to the gun, as they had no recess (making them earlier than '59.) I took them off in case I ever find an earlier K38 Masterpiece. Have pachs on it now.

I was able to find some era appropriate recessed diamond targets, but they went on a (much cleaner) Model 15. Most of these grips are well over $100 (last time I checked), but I paid $75 because some of the wood had been chipped next to the trigger guard. Other than that, they're the cleanest set of diamond targets I've ever seen.

Congrats to the OP for finding the era appropriate grips...to all others, keep looking and you may find something priced reasonable. It might take time.