DEC H207 Core Memory Boards

Hello, all, I recently came into possession of four DEC H207 Core Memory boards. They consist of a quad-width board that has a large number of signal steering diodes, with an attached daughter board that has a 4K x 16 "Planar Memory" array made by Electronic Memories. The boards all have original DEC warranty seals on them, dated June of 1971. I'm curious as to what DEC machine may have used these boards, and what support Flip Chip modules (X & Y drive, Sense/Inhibit, and addressing logic) may have been used with the core stacks to provide a 4Kx16 memory subsystem. Give the 16-bit array size, I assume that it may have been used in a PDP-11, but I suppose (with four wasted bits) it could have been used in some form of PDP-8 system. Any help greatly appreciated. Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com