Hi Chris.
Thanks for your input. Would the TELEGRAPHY EQUIPMENTS box be a key locked steel box, like a small strong box by any chance? I have seen the odd one over the years at flea markets but with no ID on them.
Here is a slightly different angled photo of the mystery bits under the 52-Set bench. The photo is from the same RCSIgs .ca Website. In this photo it looks like either two large units with two sets of fittings at the top of each, or four smaller ones with a single fitting on each. There also appears to be a clamping devise across the top of them locking into a vertical rod at the right side, not unlike a battery hold down clamp.
David
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