Re: Phones or intercoms?
I remember, as an apprentice for Telephone Rentals in the 60's, going to Halliday Hall in Clapham South. They had a system there using similar phones to communicate with each room from a manual exchange. At the time it was student accommodation but I read that it was originally a hotel. As it was a while ago I can't say that the phones were identical.
Don m5aky
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