Hutch,
the 127V+0 system remained in use at least into the 1970's in parts of Europe. I'm not sure when the system was introduced, but it must have been a long time ago. From another thread we have learnt that the American plug is from the 1920's. I believe the round European plug is older than that, although I have no proof. To this day, shucko plugs carry a DC rating.

Saudi Arabia has been influenced by both American and European practice and use 60 Hz, 127/220V. This makes the choice of an American style socket which fits into a British style box perfectly logical. [Linked Image] I know of no other country in the Middle East that uses 60 Hz or 127V.

[This message has been edited by C-H (edited 12-29-2003).]