57A dial intercom
By Rick Walsh, ; posted January 26, 2008; hits 1710
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| rare WE 57A dial intercom - 9 station 19"strip mounted in 4-plate wall mounting. Part 1A Key Telephone System. 1A KTU hold circuits mounted below on Z-bars. The 57A was superceeded by the 207A dial intercom of the 1A1 KTS. |