vintage electric shop doorbell, mid century new old stock never used

Mid century vintage electric shop doorbell, 5 3/4" long and 2 1/2" across the bell. Never used new old stock. It's unmarked, but we believe it's made for around 6 to 10 volts AC or 3 and 6 volts DC. There's no transformer (or battery) included.

Item No. z58155
SOLD