There are several makers of wrenches like this, with the same pattern. Most all are marked DIN 895. Some names marked are Hazet, Walter, and Heyco. Some are unmarked, other than the size and the DIN mark.
I have a pile of these I have collected up. I need to get them all out and look at them.
Some are worth good money to collectors looking to complete OEM sets of tools for VW, Porsche, Mercedes, etc.