An antique metronome is a metronome produced during the 19th or early 20th centuries. Metronomes are devices which produce a regular tick or beat, the speed of which can be altered. They have traditionally been used as tools for musicians, as an aid to playing at a particular tempo. This tempo is measured in BPM, or 'beats per minute'.
The majority of modern metronomes are electronic, and use a quartz crystal to keep perfect time. Antique models, which have been produced since 1815 when they were patented by the german inventor Johann Nepomuk Maelzel, use a pendulum mechanism to keep time.
Antique metronomes are a niche area for collectors, and the value of such items varies depending on their condition and rarity. The majority of antique metronomes are sold as purely decorative items.