I bought my 3"HB 36-1 RB new in 1980... SN is J6418XX To make it more confusing both RB & SB in the same SN sequences. Apparently a lot of depts. issued 3" to female officers & the other details varied with the contract requirements.
It served OD, rare plainclothes needs & for shifts when I was "driving" a dispatch desk. I used a Bianchi IWB. I could conceal it with banna targets, under a sweater... I was a lot thinner, LOL!
Still a sweet gun. Still own it.

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NRA LIFE
Reserve Officer 9yrs