Mercedes-Benz Bakelite Tire Pressure Gauge office I believe this is prewar

I believe this is prewar but it is possible that it is early post war

and do both of those with an equally beautiful vintage looking adapter

If you are as interested in these sort of variations as I am

which may have been attached to a small mirror at one point

Mercedes-Benz Bakelite Tire Pressure Gauge office I believe this is prewarPeriod German tire pressure gauge from Mercedes in Bakelite. Possibly post war made, but this style was introduced in the 1930's and continued in production into the post war years. It does not work as far as I can tell. It does hold pressure when you put it on a tire but I did not notice any reading.