Museum of Plugs and Sockets logo, small Missing or Unknown
plugs and sockets
navigation icon navigation icon navigation icon


On some pages you will find a Request for Help, that may refer to a missing plug or socket.
The "most wanted" items are summarized here, with links to the relevant pages.

Unknown material refers to plugs or sockets in the collection whose origin and use are unknown to me.

Your help to find a missing item or unknown information is greatly appreciated !
>>>  Click Home for the address to contact me   <<<



Greek Tripoliki adapter outlet
For decades Greece had a 3-pin type of earthed plug and socket, named Tripoliki (Τριπολικές) which means three-pole. Late 1980s Greece authorities have decided to switch to CEE 7/3-7/4 (Schuko) standard for earthed plugs and sockets.

The museum has a Tripoliki plug, but a matching socket is missing.

Occasionally Tripoliki sockets can be found in some older houses in Greece.
Please contact me if you have an out-of-service socket, or a socket that you
like to replace by a Schuko socket.

The image shows the outlet of a Tripoliki - Schuko adapter.



a - d The Bakelite plug and connector with two angled, flat power pins and a round earth pin have been identified as late 1930s models, made by Vynckier Frères & Co. in Gent, Belgium. They are now shown on the Belgian heavy duty page (see nos. 17-20).

Unknown British T-slot connector

e An uncommon T-slot connector plug rated at 10A - 250V that has been made in England.
The museum has a few T-slot sockets and plugs, but they are incompatible with the shown connector. The critical difference  is the slot spacing (9.9 mm for the connector).
Classic U.S. T-slot spacing is 13.8 mm. NEMA 2-20R has a larger slot spacing: 15.9 mm.
Non-earthed T-slot plugs and sockets are
used In Australia for extra low voltage. They have a slot spacing of 15.2 mm.
The significance of the T-slot model made in England is not clear. Was meant for export to …?, or was it an adapter plug for …?
If you recognize the English T-slot model, please contact me; find the address at the home page.


navigation icon
D i g i t a l   M u s e u m   o f
navigation icon
P l u g s   a n d   S o c k e t s
navigation icon