Well, let's see -- it's definitely a Norwegian Krag. The 6.5 X 55 caliber, receiver details near the loading door, and lack of a screw holding on the sideplate are indicators.
The stock looks like a Norwegian Model 51 Sporting Rifle (M51 Elgrifle) (see Brophy, The Krag Rifle, p 146) with the original "fishtail" checkering pattern. The wood is beech, but does not have the dark stain of the original M51 stock.
And unless I'm mistaken, that is a Norwegian match trigger we're looking at in the picture. Did Heilmann make matching/mated "V" cuts in the sear and trigger to precisely locate the Rigby bolt peep? (another picture of this detail SDH?)
Looks like a nice rifle to shoot and carry.
