A "Mystery" brass Tischbarometer by C. P. Goerz of Berlin. Circa 1925.

3" dial with English markings.

Height: 16.5 cm.

Diameter: 8.5 cm

C P Goerz AG Berlin barometer catalogue 1925 (PDF): 

https://www.analogweather.com/uploads/7/7/7/5/77750690/goerz_ag_-_tisch-_und_wandbarometer_-_1925.pdf

 C. P. Goerz was founded in 1886 by Carl Paul Goerz (1854-1923) in Berlin-Friedenau.