Not sure if this belongs in the 'Antique Telephones' section, but since it is key system related, I'll post it here...
Ask a guy who just scored an open box but seemingly
unused 631DAMW1-60 Call Director anything:
Not sure if I linked these photos correctly.
I do have an operational 1A2 key system with 6 button phones. Now just to find a way to get this beast up and running...