Tascam Porta 02 key piano key knob

Had these lying on my desk for ages, I believe these are from the Small Porta 02 original version, I maybe wrong here. remember the Porta 02 is not  the  big Portastudio 02, daft why they named it like that.

They may have been used in some others

So I have these here, they do break, Have only found the 3 types for now.

Let me know if I am wrong here.