This is a vintage French high (or perhaps low) temperature warning display sign.
Markings: as per images
Sourced: in Normandy, France
Age: circa 1980-90’s
Size: 42 x 30 cm – 16.5 x 12 inches
Unpacked weight: 250 g
Condition: in vintage condition, signs of previous use, scratches and scrapes, scars and marks, please see all pictures
Shipped from France