Vintage 1970s hollow stem beer glasses set of 4, mcm home barware glasses, home

...entertainment set A set of 4 hollow stem beer glasses from the 1970s. Marked with a intertwined quatrefoil mark underneath. With marks of age and use including some rainbow sheen / white marks to the glass (dishwasher damage?), they stack nicely and would mix in well with an existing set. I have 2 sets available, set A has a few more scuffs, set B a little more cloudiness to the glass Size ca 5.5 inches tall (13.8 cm)