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Meterfabriek Dordrecht, type D3XBd, made in The Netherlands, 2 rate, 10 - 30 Amps, C = 600 revs / kWh, used in houses with electric boiler, night store water heating.

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English Electric, type B31B, made in U.K. 40 Amps max.

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Sangamo, type S 200.33, made in U.K., this is the remote dial version from the S 200.31, a little 24 volts dial can be fitted outside the house which gets pulses from the 2 pole c/o switch attached to the meter dial. These meters are used for houses with inside switchboards. 20 -80 Amps, 166 2/3 revs / kWh.

I will submit some more details later if anyone is interested.

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Sangamo, type S 301.2, made in U.K. 3 phase 10 - 60 Amps, 66 2/3 revs / kWh, used a lot in smaller 3Ø installations like pump sheds and small workshops which require a 3Ø supply.

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Thanks Ray!