Brown bakelite adaptor used to connect three plugs to a single socket outlet.
This small adaptor has three BS372 5 amp round pin sockets, one directly in line with the plug and two others at an angle.
Both pins are the same size, so a plug can be inserted either way round. Not suitable for appliances requiring an earth connection.
The plug pins are also 5A, so the sole purpose of this device is to allow more than one appliance to be connected to a single socket outlet.
This adaptor is not fused, so it would be easy to overload the socket - theoretically 15A from a single 5A outlet.
The front has the round CLANG logo between the two pin holes.
The back states Made In England, and a small circle contains the rating - 5A, 250V.
Stuff