Notice in the phot above how the pipes all come out straight up. This was like this on the later TR2s all the TR3s and some of the early TR3As like mine. Later, S-T put on master cylinders that were superceded by a new design where one of the two pipes comes out on an angle. It was about 1962 that I had to buy a new M/C from S-T and I got one that was inclined. I lost pints at judged concours events because one (the inclined one) was wrong.
See how mine looked from 1965 or so till I restored my TR3A from 1987 to 1990. Since then, I've driven 102,000 miles and kept it all very clean compared to before when it had 80,300 miles from new.
And those are all the same original parts except for the clutch M/C.