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Old 5th Mar 2012, 8:17 pm   #100
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Join Date: Mar 2008
Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.)
Posts: 2,758
Smile Re: Another unusual plug and some other questions

Possibly, or clever marketing as the householder had to buy Crabtree plugs! I don't think it lasted long as I've got another socket of the same age which does not have the central rod and will accept any make of plug. Either it was a later version, or the interlock feature was a "with or without" option.
Cheers, Pete
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