pdf C38.670.2 Add iA Mar60 - Michigan Bell - 700-Series Inst Popular
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C38.670.2_Add_iA_Mar60_MI_Bell_700-Series_Inst_tci_ocr.pdf
Addendum by Michigan Bell including, among other things, installation of Princess sets in manual exchanges without an apparatus blank. Contributed by Dennis Hock, and referenced in his January 2023 Singing Wires article.
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