r/Vintagekeyboards

Probably a btc?

Bought this keyboard off a local electronics junk yard and the owner happened to give me this jdm keyboard I consider as free. Upon checking the switch it seems it has a cover or a dome from what they say.

I want to identify which type of switch this keyboard uses underneath because I already spent a minute looking for the exact type but none.

Keyboard Model: Hitachi PC-KBS001 (According to serial from its back cover) but the closest or the exact model can be found but it has a diffrent serial number https://jp.mercari.com/en/item/m35982011442

Connection Type: PS/2