Yep, later 4th Model. Maybe around 1908ish.

Could be a Re-blue; doesn't seem to have that real Royal Blue Colour, but 105 years of Atmosphere can do all manner of things to Blueing.

I have a soft spot (no doubt in my head) for the long barrelled 38 DAs too, especially the Blue ones!! Very nice Gun No7!!

Come to think of it; I have a soft spot for the Short Barrelled ones too!!