My grandfather's HK, been in a closet the last 80 years,oct. to round barrel, engraved stock and breach with engraved spoon bolt and looks like a k98 action, no serial number, just his name. Double set triggers and barrel dovetailed with open sights. I remember shooting this gun as a kid some 30 to 40 years ago, and my older brother says our grandfather had it before he died in mid 1920s. Anybody know anything about HK bolt action rifles or where I can go to get more info?