I owned one of these and a 4052 back in the day. I don't remember the resolution but it was good compared to other small computers of it's day. And the display in the 4051 used vector graphics and not an X-Y display. I gave mine to a friend of mine along with all the manuals, disk drives, SW etc and he may still have it. If anyone gets seriously interested in these, contact me and I'll try to put you in contact with him. I doubt that he's interested in selling it but if you need help with one he should be able to help. The last that I heard, he had it in storage in north Florida. Sorry I can't help with the specs other than the 4150 used a 6800 CPU and had IIRC 16k of memory and ran BASIC and had 4 external 8" floppy drives. I used mine a bit but never got into it's internals.