Vintage Coca-Cola thermometer

Description

It was purchased by my husband a long time ago.
It was a nice miscellaneous item, so I displayed it for a while, but I decided to give it up because I hadn't seen it.
I don't see much even if I search on the net, so it seems to be rare.
Some parts of the board have holes from the beginning.
There are only a few scratches on the corners and the metal fittings that hang on the wall are rusted, but other than that, they are in a state of no fading.
The size of the board is about 21 x 30 x 1 cm.