I appreciate the OP's showing us his very fine rifle. Back in the day one of the top actions used building a custom hunting rifle was the G33/40. It was unique in the hollow bolt handle and lightening cuts in the receiver. Plus Czechoslovakian actions are held in high esteem till the present day.
OP's rifle is a good example, to me, of custom work. The selection of wood is very good. The checkering, from the pictures, is flawless. The wood to metal fit appears "air tight: The lines of the stock are good. The overall design of entire rifle shows good taste and design if you are into classic sporters.The attention to detail is excellent. Every aspect of that rifle appears very well thought out. If one has any feel at all for classic high powered rifles this rifle would come out a far beyond average. I like it due to no white spacers or bulbous Monte Carlo cheek piece.
That scope looks like a Leupold M8 variable. The base is clearly a Burris. Burris company dates from 1971.What we see may be the way that rifle was set up originally.
I prefer to leave marks on the receiver that identifies the origin of the action. That rifle would sell as a G33/40 based very high quality custom rifle. On the down side there is an unmodified 33/40 carbine on an auction site today where the last bid was $3750.00. I have known several advanced collectors of German WW2 firearms. Those guys held that a big problem doing research is unreliable information in print
