Mine is blue (or what's left of it), also 5 inch, otherwise all original matching numbers and I believe the grips too, but no trace of pencil number remains. Serial number 105093, Dr. Roy confirmed ship date October 1921.
I could only fondle this beauty for over a year until last Christmas when I was given 3 boxes of HSM Cowboy Action Soft Lead flat nose ammo loaded by HSM in new Starline brass. Finally got this gun out for shooting and target is 12 round standing at 15 yards.
At my age I'm usually shooting 10 yards, but no lead ammo allowed so had to find a different place to shoot and the minimum there is 15 yards, so I'm thrilled that all 12 got on the target.
My ammo benefactor searched high and low for a year to find the HSM and tipped me that the above mentioned seller (in Detroit) had such bad reviews that it almost appeared to be a scam so do your own personal research before sending any money to anyone on-line regarding 32-20 WCF ammo.
That nickel one the OP posted is really sweet...I'm on the lookout for more of these 5 inchers, especially a nickel one!