What kind of press-in depth do these special rims have?

Hello, I’m in despair. Since my father died and we are now cleaning out his hobby workshop, we want to sell what we don’t need. Among them are never mounted stainless steel wire spokes rims (if I have researched correctly by Dayton, but I don’t know exactly that). I had already set the rims for a short time on eBay, but took them out again, because a lot of questions came up which indentation depth the rims have. Unfortunately I don’t know and I don’t find them in t. Now one reads in the net, one should measure level A and level B etc., these are Bohemian villages for me and I just don’t sniff that. Does someone have a guide for doofes like that with the calculation of the Et? Gruss Axel PS: the rims should be here for a Mercedes 124 times everything inside is punched: 7Jx15 H2 XW 741 5 Loch Wil