Flat top clutch master cylinder to suit PRE 65 minis.
Originally the top of this master cylinder would have had either a removable union or a small hexagonal nut shape machined into it, but neither of these options are available so the pipe goes directly into the flat top as per normal but the outlet is period correct.
The later master cylinders post late 1964 have a more pointed shape where the brake pipe comes out.
Ensure the correct DOT4 or DOT5.1 brake fluid is used as these cylinders are not designed to use anything else.