Another one from amongst my late father's tools - "Elora 18 4-1 W. Germany" - two square drives, ¼" and 5/16".
IIRC, Dad bought this in about 1970 when he ran an 850cc Mini Traveller and the brakes got so bad, they needed constant attention. Soon afterwards he afforded himself a new car. The wrench has been hidden away in a tool box ever since and is essentially as good as the day it was bought. Them Germans knew a thing or two about mixing a good batch of steel.
These things aren't particularly uncommon. They come up on Ebay from time to time.
I particularly like the way the arm flares out at each end.