These cartridges appear to have been manufactured from 1970 to 1976 at the Rheinisch Westfalischen Sprengstoff (RWS) factory in the German region known as North Rhine-Westphalia in the city of Troisdorf.
My sources state that the trademark over the Sinoxid name is a differentiating factor from the 1977 versions with no registered trademark indicator over the Sinoxid name. LR-20 is the designator for the cartridge box. The R-8 headstamp consists of an R inside a shield.
This single box of 50 cartridges is in very good shape with only a wrinkled end flap. There are no tears or other damage to the box. The ammo itself is also in good shape with no corrosion on the nickel plated cases or bullets.
Anyone have an idea on valuation?