meh! I was actually wrong, only one of the IBM was from 1985 but the rear sticker was in a very bad condition that I only could see "1985 - 0 -
" and the other ones where 1990 and 1993.
I'm sorry to tell you that I carried back the wrong keyboard
I only could take 2 keyboards since I was going home with motorbyke and it was rainy like today. The 85 one it's just sitting somewhere at the trash amount of CRT, Unicomp membrane keyboards and plenty of electronic useless but not at home.
Instead I took pics some while ago of the 90 one
Spanish IBM :
The cable it's messed up and won't work because we still use those keyboards at the hospital and the ones that don't work they put them all on the trash just waiting for a high amount of them to pay someone to get ridd off of all the trash.
Maybe when I have time I can try to clean it and dismount the case to see what could be wrong in it but don't know too much about electronics.
Sixty I have the crapy pics of the sphericals Keycaps and the MX Black in the mobile phone but I don't have the cable to put them in the computer