"PLUMBERS LARD OIL". Historically, lard oil was a highly popular animal-based lubricant favored by plumbers for metal threading, cutting, and pipe assembly operations due to its high thermal stability. [1]
Manufacturer: The lower text reveals it was manufactured by the National Refining Company in Cleveland, Ohio. Founded in 1882, the National Refining Company was a prominent competitor to Standard Oil and was famous for its "En-Ar-Co" motor oils and its "White Rose" gasoline brands. 081326