This is a BRNO Full Stock Carbine, barrel lenght 21".Caliber is 8X57  Barrel has a full rib.  Total length of gun is 42"  If the numbers by the proof marks are the date, it was made in 11/20. The bolt knob is an acorn design.  Just in front of the bolt are two holes, possibly for a receiver sight. Stamped on the front receiver ring is  CS. ST.   ZBROJOVKA  BRNO.  Someone in the past has removed the steel buttplate and nicely installed a leather covered recoil pad. This is the oldest BRNO I have had and the only one with the rib and acorn bolt handle.  Quite unusual. Must ship to FFL holder of your choice.  Buyer is responsible for all shipping and handling charges.  Gun will ship in a hard case inside a cardboard box.  Payment by Cashiers Check.  Shipping will be  three days after receipt of funds.