Vintage ADT Fire Department Porcelain Sign opaline for a 100+ year old

for a 100+ year old refrigerator

Features the company's logo and sans serif typeface in red and blue graphics

or "the Claudian water"

such as minor dents and scratches

Vintage ADT Fire Department Porcelain Sign opaline for a 100+ year oldc. 1960s; The ADT (American District Telegraph) Corp. Baltimore, MD Vintage porcelain emergency and vanity sign. This item would be next to sprinkler systems on walls in businesses that hired ADT Protection Services. In the 1960s, ADT had a monopolization (in restraint of trade) on the market and almost 80% of central station alarms were provided by the company. It exhibits small patches of oxidation, but is overall in good cosmetic condition,