Based on context, I suspect that this was from one and the same seller who currently has a very similar board on eBay, and has for the past year or so: NRS1 (Richard DuBois).
I archive this here to keep this rare stuff documented somewhere, before it all disappears into obscurity:
Entrex 8K Core Memory Board from: 1971
8K Core Stack on 16 bit Memory Board
Nice Piece of Vintage Computer History!
This board measures 15" X 15"
A copy of the NOVA 16K Memory made by Data General
Pulled from a Entrex/Nixdorf 480 Computer Mini Computer
Entrex was bought out by Nixdorf Computer and Nixdorf was
merged to Siemens Nixdorf Informations systems than later split off to
Fujitsu Siemens Computers and later known as
Wincor Nixdorf .
44 YEAR OLD CORE MEMORY !!!
Collectors or Teaching Item
Sold As Is * No Returns * Not for use
You'll receive the item pictured - only have one!