It looks like a memory module out of an IBM 3174 Establishment Controller.
Patrick Finnegan
On Fri, Nov 23, 2018, 10:48 Paul Koning via cctalk <cctalk at 
  On Nov 23, 2018, at 6:13 AM, Liam Proven via
cctalk < 
 cctalk at classiccmp.org> wrote:
 On Fri, 23 Nov 2018 at 01:49, Donald via cctalk <cctalk at classiccmp.org> 
wrote:
 
 Don't think it is IBM.  Apparently high temp ICs due to the heat sink
 housing. No idea what it is.
 
http://www.myimagecollection/part 
 No idea, because that's not a valid URL -- it has no TLD -- and you
 can't send attachments to the list. 
 
 Stick a .com in there and it works.
 I don't think it's anything high temperature; the ICs look like plain
 plastic cased commercial temperature range parts.  Why they are packaged
 like that is a puzzle.
         paul