Posts 592/593 is a VERY hard to find RCA AR88 Loudspeaker. It is only rated at 2.5 Ohms. This was a late production run for Canadian and British Contracts as it had the Pocket Watch Holder predrilled and capped off so one could be added if needed. Earlier versions lacked that feature. The AR88 Series of receivers were a very highly regarded Intelligence Gathering piece of kit still in use in remote northern areas of Canada well into the Cold War Era.
You would be better off sticking with the Gunnery Speaker designed for the 19-Set/Tannoy System.
David
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