The Lorraine was the very first prototype of the A1000 with all 'custom chips' put up discretely on large boards (see picture), the main board was in a black box app. the size of an A2000.
When silicon was ready, C= put out some pre-A1000 developer boxes to start software development before market intro - that box seems to be one of those. They should be pretty much A1000s with EPROM kickstarts, and lots of those little workarounds to make them go. :-D
