deskthority

See these:

http://kbtalking.cool3c.com/article/11086

Notice the weird numbering, including the diagonal backwards "11" and "6".

I have some white switches that I am guessing are the same as the blue ones from here:

http://www.ebay.com/itm/130541363513

They're stamped "11" and "6" identically. The metal parts are virtually identical. The plastic parts have been retooled since, but whatever they use to stamp the numbers is the same, as the "11" in particular is stamped in exactly the same way (size, angle etc), as is the "6":
Clearly some of the parts come from the same company.

I'm going to see if I can get hold of Hottek and learn something about them.

Hey Daniel, did you get much further with this one?
A Japanese collector (@navi_Tastatur) posted some images of what I suspect might be an HTK switch. He has kindly given permission to use his photos on the wiki.

yfrog was troublesome for me so I reuploaded what I could to imgur. The two links that weren't working were:
"Inside of keyboard": http://twitter.yfrog.com/mgid4pmj?sa=0
"switch": http://twitter.yfrog.com/nx9oiphj?sa=0

The e-mail address on the website is dead; I tried another one that seemed to go through, but no reply. I ran out of luck with companies last year I think — I've hit nothing but black holes and brick walls ever since.

Are these clicky?

Mine are linear.