Kaypro Motherboard Add-On Question

[Glen Slick]

On Sat, Dec 12, 2015 at 8:32 AM, Jim Brain <brain at jbrain.com> wrote:
> http://www.ebay.com/itm/USED-KAYPRO-4-COMPUTER-MOTHERBOARD-/331730690952?
>
> The non soldermask boad on top of the main unit intrigues me.  Does anyone
> know what it is?
>
> Jim

The board says Centram Systems, Inc, Camp Hill, Pa.

There is a marketing blurb in the August 15, 1983 issue of
Computerworld. Don't know if it is for that exact board.

Long ugly link:
https://books.google.com/books?id=soGti0kvtgwC&pg=RA1-PA71&lpg=RA1-PA71&dq=centram-systems+inc+kaypro&source=bl&ots=6Vnr0qZn3W&sig=otazIdpkt4Y5Oyrp9jjKKrv_dq4&hl=en&sa=X&ved=0ahUKEwjHtaP34tbJAhUL9mMKHWnaDYQQ6AEIIDAB#v=onepage&q=centram-systems%20inc%20kaypro