The only model 64's that were never issued were the 64-5's. There were alot of officers that traded their 5" service guns for snubnose or shorter barreled guns when they retired.

I know up until a few years ago DPD still have model 64-2's they would give at retirement. I also know they still have some used model 10's in inventory.

A lot of the officers that took New guns when they retired never took them out of the box. They owned other OD guns they liked to carry already.

The model 12-2 I posted belonged to the president of the Sgt & Lt's association and he never fired it but 6 bullets when he got it then put it in a drawer for 15yrs until i bought it.