19th c. San Francisco "Pac Tel" Telephone Extension Ringer Box c.1890 Polaroids The original smoked glass top sits CREATOR Ingento The original smoked glass top sits on small wooden pegs and small glass divots designed to anchor the glass to the slight wooden frame An original pair of bronze plate German Shepherd bookends mounted on Mahogany bases with original felt and label In early telephony standard party line and local exchange configurations utilized 1000 ohm ringers to draw the correct amount of current from the telephone line without disrupting voice transmission or preventing other phones on the line from ringing