5A plug with three 5A sockets.
The plug pins are BS546, 5A. Three round brass pins, L&N are split, the larger earth pin is solid.
The opposite side has a 3 pin BS546 socket, directly in line with the 5A plug.
The pin side has the WG logo, Made In England and Load Not To Exceed 5A, 250V.
The side has a three pin BS546 5A socket, and a two pin BS372 5A socket with the holes between the three BS546 socket holes.
Note the two pin socket holes are spaced closer together than the 3 pin equivalents.
This adaptor does not have an internal fuse, since all of the outlets are the same rating, and it can only be plugged into a 5A socket.