zenith: Zenith Trans-Oceanic H500: variations

When I compared the two H500 Trans Oceanics from my collection, there is a remarkable difference concerning the power supply:

On one set, I find the power selector for 110 V AC-DC, 220 V DC and 220 V AC; between the power lead and the phones jack, there is a switch labelled "SEE INSTRUCTION BOOK".	On the other Set, I find no such selector; there is no switch, but there is "INSERT A.C. PLUG HERE FOR BATTERY OPERATION" engraved in the chassis.

The model with the power selector (with the black cabinet (power resistor ?) is the one found in J. Bryant and H. Cones' Book, the other model is the one found in Sam's Photofact (found at BAMA), it has no traces of the switch having been removed, so I consider it two genuine variants.

You may encounter both models when having a look at the images from our members.
Kind regards Martin Boesch

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