A Ford single rail box like a type E, Escort fitment with the shifter forward of the end,
but the interesting thing is the Masport name cast into the bell-housing & the main-case. From the pictures they look like just grotty cast iron parts but I have a Masport cast bell-housing in alloy from New Zealand. Considerably lighter than Ford's cast iron original. Ideal for motorsport competition. You should have a closer look at the material. If they were determined as being alloy then determine the gear ratios & remove top cover and inspect to see if it's dog or syncro box. You could be lucky.
SFE