i come from germany ( that's why the bad english on my part

and have a question about this keyboard:
Have anyone a BTC-5050 keyboard ( it looks like the BTC 5060 on this sites ! )
or some technical details about it ?
I´ve bought one 2 weeks ago on ebay.de (germany) for 6,- Euro incl. shipping-costs.
But in google there seems to be no information about it...

Is this a mechanical keyboard ?
I will take it to a local computer-dealer ( some years ago a Commodore-Amiga dealer, too )
to remove the keyboard keys, because my technical skills are very small.
To take a look under the caps,

If anyone is interested, i can create photos !
Retro-Kazek