I find a bit of a vagueness when it comes to early Micro Technical models. Anything pre MkIII is quite rare, we are talking low production numbers, the last MkIII serial number is only 2260.
I've seen a lot of MkIII's for sale usually the covering material is in bad shape, I re-covered both of mine last year. I think the answer is there was some fluidity between models and parts getting used up. I've just found a photo of a MkIII with a Focal Plane shutter which has the same focus frame and folding hood as yours, it was on the old MP Users' Club website. I've sent it you in a PM.
When I got my MkIII it came with most of a second in bits but missing the back, I bought a back and later rebuilt it, when I'd finished there were still a few bits left over and these included the extension rods to allow the focal plane shutter to be fitted. I think your camera may have had a shutter which was later removed. It's not as simple as I first thought as the original back has to be either completely or partially removed to fit the shutter. That could account for the different focus screen holder and fixed hood.
Ian