This classic style -traditional metronome with plastic case by Wittner is a Maelzel system metronome.
The Wittner Metronome has exquisite German craftsmanship with precision-built parts. This metronome is large enough that it is ideal for small ensembles. It is also useful for grand pianos as it is clear to read whilst free standing.
The range is 40 to 208 beats per minute with an accuracy of -/+ .08%.
Dimensions are 4 1/2" square base x 8 1/2" high.