Vintage Stop Fire, Inc Extinguisher - Brass fire extinguisher, Aircraft? patina

Description

Vintage Stop Fire, Inc Extinguisher - Brass fire extinguisher, Aircraft? patina  - EMPTY
this has original tarnished patina,, leave as is or would probably shine up nicely
some are listing this as an aircraft fire extinguisher,, I am not sure of use,,
the plastic cover on the gauge is cracked and discolored,
take a look at the pictures, thanks