Unknown Z80 CPU board and backplane ID anyone?

[Gregory Beat]

Agree about Varian trademark.
In 1937 the Varian brothers developed the Klystron tube.
In 1965 Eitel-McCullough (EIMAC) merged with Varian Associates, but in 1995 the EIMAC division was “spun off” (now part of CPI).
In 1999, the company was reorganized into three distinct businesses: 
Varian Medical Systems Inc., Varian Semiconductor Equipment Associates Inc., and Varian, Inc. 
==
The Card Edge connectors on motherboard are Sullins Connector Solutions, Inc.
http://sullinscorp.com/catalog/

MPS-0125-50-DW-5H
Edge Card Catalog
http://www.sullinscorp.com/pdfs/edgcards-catalog.pdf

Card Edge Connector, 100 Contact(s), 2 Row(s), Straight, 0.125 inch Pitch, 
.025” Square Wire Wrap - .610” Insulator Height, Blue Insulator,
Raised with .125” Clearance Holes, .190” Contact Length for .025” Square.
===
For reference purposes, S-100 motherboards use Sullins EBA50DCSD .
https://www.digikey.com/product-detail/en/sullins-connector-solutions/EBA50DCSD/S3288-ND/927240

Greg
chicago

Sent from iPad Air