It seems like the ADK was made in many places.

I have a 1996 one from Thailand. This one is used regularly and is quite nice for typing.

Also, a 1994 one of unspecified origin. Nasty to type on, and several of the keypad keys require a hefty stab to work. This came supplied with a P475 when new.

And at work, another 1994, this one from Czech Rep. Not used much, so won't comment on performance.

All 3 of these have the stepped Caps Lock.

I like the Exteneded II for typing but the footprint's a bit big for some desks.

I have several 'Apple Keyboards' (first supplied with SE I recall). I quite like these and use them regularly but am finding increasing problems with keys physically sticking down.

The Apple Keyboard II is another. I like the indented ADB sockets, but this is not so great for typing, and the esc key is not in the right place.

I like the design of the USB keyboard (first supplied with iMac) - compact, yet lots of keys. But again, not great for typing.

I recently got a Pro Keyboard. Not tried it yet, but the lack of power key is annoying.

Another thing about the USB keyboards - the dimples are in the wrong place (F&J instead of D&K). Annoying for a long time ADB touch typist.