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Lambert Schmidt Telephone Manufacturing Co. tapered shaft desk set
1902
Keystone Telephone Co. No. 43 straight shaft desk set
1902
Keystone Telephone Co. straight shaft desk set
About This Phone
Original Keystone Telephone Co. straight shaft, black with marked nickel transmitter and trademark “Keystone” emblem in the switch hook. The scan is from a Keystone catalog, 1910.
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