ugadeer,
Can you take the barrels off and post photos of all markings under the barrels, and on the action flats.Of special interest would be a clear photo of the caliber marking(38-55).While some rifles of this type may have been made in 38-55, for export to the US; I suspect this gun is a WW2 "bring back",chambered for one of the 9.3mm cartridges and mis IDed as 38-55.After the war, a fair number of 9.3x72R rifles were used with 38-55 ammo.This mistake was due to lack of proper ammo,and lack of information regarding how to ID the actual caliber of war trophy firearms, brought back by GIs.If you haven't had the barrels off, you do so in the following manner.Remove the "key" in the forearm ( some have a detent to prevent complete removal and possible loss,just move the key to the detent); open the action by swinging the lever under the forearm; and slide the barrels back, up,and out of the gun.The forearm will remain attached to the action.This type gun is fairly often found,but usually with combination or double shotgun barrels.Also it would be helpful if you could make a chambercast,and "slug"the barrel.My opinion that it is a "bring back" was partially formed because of the clawmount bases on the rifle.Installation of these bases, may have covered up or removed the name of a dealer or maker.I'm pretty sure that we can help, but may not be able to positively ID the maker.
Mike