Vintage Red Wing Shoes ANSI Z41 PT91 whatever that means🤣 HEAVY steel toe boots

Vintage Red Wing Shoes ANSI Z41 PT91 whatever that means🤣 HEAVY steel toe boots these boots are substantial! Very heavy very vintage but in surprisingly good shape a little pilled on the inside and looks like the front of them got greasy or something by the darkening of the leather towards the toes soles are good stupid thrift store sticker gunk on the insoles (jerks!) no size that I can discern I’m guessing a women’s 8.5 B? Maybe? Maybe an 8. So a men’s 7 or maybe 6.5. 🤷🏻‍♀️ I am an 8.5-9 and I can put them on but they seem narrow in the toes for me maybe you can make sense of all those random numbers on the tag and inform me the correct size?