Description  Wow! This is the ultra-rare Keyport 717 for the Apple ][. 
This huge (one foot by 2 foot) external keypad contains a whopping 717 keys! It includes an overlay for Applesoft, as well as two blank overlays for your own marking. 
Also included are the original manuals, and two floppy disks. 

Offered for bid on ebay.com - REF:

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1260053651 

on 7/31/01

All I can say about this monster keyboard for the Apple II series
is ABSOLUTELY MIND BLOWING & AMAZING.

See the jpeg files of it all.