Radio Voltmeters:
DRP and JT
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| Manufactured: | by D.R.P, c 1930's | Manufactured: | by J.T. c 1930's | |
| Serial Nos. | DRP 467602 and DRP 492126 | Serial Nos. | None | |
| Voltage range: | 6 Volt (200 ohm), 120 Volt (4000 ohm) | Voltage range: | 12 Volt and 120 Volt | |
| Size: | 55mm diameter | Size: | 55mm diameter | |
| Comments: | Glass fronted, chrome plated body. 375mm earth cable with point contact probe. | Comments: | Glass fronted, chrome plated rounded body, much more like a pocket watch. 240mm earth cable with point contact probe. |