Please ignore a few cast shadows from the photography. Wall mounted with an indented hook on the back (see photo). I remember my grandmother tapping it to set it. It has been in careful storage for perhaps forty years, but unused. A high quality barometer, stylish and distinctive.
Condition is excellent, with a few miniscule dots on the white face. There are a few scattered marks on the brass surround, which is somewhat dark: it may be tarnish or not.