Brings back memories! I learned touch typing using two IBM Model M keyboards that my friends dad got from some bank office he was hired to clear out (the bank had closed, I think he drove half a trailer filled with those keyboards to the recycling center, would probably be worth quite a bit today!)

I took two, spray painted one black and switched over every second keycap so I had two keyboards with every 2nd key completely black.

Today I use a Logitech G413 mechanical keyboard at work, it's descent, but I still miss the old battle-tank Model M sometimes :)