So, I got one of these in my hands. It was bought here locally, but belongs to
@jajan547 who has kindly let me play with it for a while before shipping to him
.
This one actually boots (no picture of that yet here, but will show later) and asks for a pin code. I have dumped the ROM (also attached) and was able to extract the system in it which can be opened as a second disk with another system in Basilisk II. The system is a very minimal version of System 7.1 that contains to special drivers, guessing these two are there to activate video output when doing dev-work.
This is an old dev unit, so it has the 2MB ROM. Travelling now, so will be until the weekend before I can play with it again. According to what I have read so far, it only accepts 2MB ROMs, but if you have a BMOW or CayMac ROM (and programmer) it might be worth testing installing the attached ROM into one of the "production units" that came with the green ROM.