Hello icecold. Welcome to Geekhack.
Those do look to be Cherry MX black switches. It is interesting to me that that is what they are, since the "KB-5150" with that exact same styling and layout, is usually supposed to have foam and foil switches.
Yes, i was surprised too when i saw the keyboard and it didnt have foil switches. Thanks for your answer.
I guess i'm buying it, the auction ends on friday and it's only about ~6$ and i like it, especially with MX Blacks. I just hope that nobody outbids me. I never really had mechanical keyboard and I was going to build my own with (lubed)gateron yellows, but this keyboard might be even better 
) I just wanted to be sure if they are MX Blacks.
Thank you people of geekhack <3
I would prefer Gateron yellow myself, both in weighting and feel, even without lube. Have you typed on a layout similar to that before? It can be a little rough to try to adjust to. I personally don't do it, even though I have a perfectly good IBM Model F XT at home. I hope you win it as well. It is worth a lot more than $6 just to the vintage MX black crowd.
I haven't :/
But i think i will try it anyways, of course if i win. If i don't I will surely build that gateron yellow keyboard. I have been following mechanical keyboards for almost a year now and I was in situations when i was just about to buy some prebuild board, but then thought that i want to build one myself. I don't like RBG and all that "gamer" stuff.
You know - i don't even know if it's going to work. The seller says in description that he doesn't know if it works. So i could desolder and then use those MX Blacks for another keyboard if the pcb is broken or something just doesn't work. For 6$ it still might be a good deal.
I have one question. Do you think it would work with AT -> PS2 passive adapter and PS2 -> USB active (i guess*) adapter?
* i think it is active - i have read somewhere that if the PS2>USB adapter has two inputs: one for keyboard and one for mouse, it is active. I'm not sure, if it's true, though. I have this one, so I wouldn't need to buy another one if it could work like that.
Do they even make RGB prebuilts with Gateron yellows in them?
Well, the interface looks to be 5-pin Din. Most people who aren't keyboard and/or computer collectors/fanatics are not gong to have any way to interface it with a computer in order to try to test it. For $6, a board's worth of Cherry switches of any kind is a good deal. Those are what people would call "vintage" MX blacks though, which are sought-after by many. People buy boards, working or not, just to desolder those and put them in something else. Personally, I would leave the poor board alone if it works.
It might work, it might not. With 5-pin Din, we were approaching protocol standards, but it was still sort of the wild west. The Leading Edge DC-2014 and Zenith Z-150 beige/white label are good examples of this. The DC-2014's protocol is ... sort of XT, but not quite. It is my impression that it won't even work with most original XT systems. The white/beige label Z-150 is sort of AT, but not quite. I have gotten mine to work with a handful of modern computers through their PS2 ports, but that's been very hit or miss. It doesn't even work with a Soarer's converter, and I have tried to help Hasu get the thing working perfectly with his TMK firmware (which I still need to get him some more data on).
If the board follows the AT protocol to a T, then a passive AT -> PS2 adapter chained with an active PS2 -> USB adapter will work. That's how I'm using this weird old Nan Tan board as we speak.
You would be correct. There was a weird period some time in the late 90s and/or early 2000s where keyboards were designed to work over both PS2 and USB, with which the passive adapters would work. That was a dark time in keyboard history anyway though. Almost everything mechanical made then was using Cherry switches, what little there was.
