This is a Ugears 70217 Engine Clock Wooden Model Kit

What do they say about a finely-tuned motor—it runs like clockwork? Flip the script with the Ugears Engine Clock, a finely-tuned clock that runs (and looks) like a motor! This functional mechanical table clock with pendulum has an automotive theme throughout, with an engine block design on top with moving pistons, and time display in the style of a speedometer (hours) and tachometer (minutes). The action of the clock’s pendulum and escapement make a delightful ticking sound, as the passing seconds are displayed on the escapement at the rear of the clock. The Engine Clock tells time for up to 5 hours on a single winding (running time can be extended an additional 60 to 90 minutes if the pistons are disengaged). A retrograde mechanism on the minute hand automatically resets after 60 minutes.