9.5 vs 4 5/8" Single Sixes

Of the 9.5 and 4 5/8" barreled NM Single Sixes, which was the least common? I'm assuming it would be the longer barrel model, but can't say yhat I have seen many of either out in the wild.

I'm going to guess the 9.5" is a bit less common. I happen to like that length and just picked up a .32 H&R SS to go with my Liberty .22 I've had since new.

The two lengths may swap places over the years and different model single sixes. But the 9 1/2" is the scarcest on models I've seen numbers for.