|DC Trembler bell for use outdoors with 6 inch gong (Bell-gong No's 9 or 15).
Operating minimum voltages
Bell No. 48A - 2.5v (25 Ohm coil)
Bell No. 48B - 20v
Bell No. 48C - 50v
Bell No. 48D - 50v
Bell No. 48C - Trembler bell, similar to Bell No. 48B, for preliminary signal in noisy
situations in PO buildings. Has twin 250 ohm coils and uses Bell-gong No. 19 (cow gong).
|Bell No. 48B
||Bell No. 48C