My research has shown that for HDs, the transition to 4 Line Address occured in the mid S68000 serial number range in 1946. I can get more specific when I'm home with my notes. All 38/44 Outdoorsman revolvers that I have seen have only the 1 line address, even though by serial number you would think they should have 4 Line address. I'll get back later with the other info that I have.
Hope this helps,
Bill
I would guess that a 4 line address on an otherwise outstanding 2nd model would be sort of a buzz kill for a collector, is that true?