Pneumatic clocks are not new (see link for a very fine article on the subject) but this is a domestic version that's powered by a bicycle pump. Once a week the owner must deliver a fresh change of air to the clocks reservoirs via a standard bicycle pump.
The modestly amount of stored compressed air is sufficient to drive the tiny piston, and escape mechanism that operates the clock.
De-luxe version comes in the form of a miniature of the famous Popp clock of which there were once 7,800 on the streets of Paris examples (link)-- xenzag, Feb 22 2020 Popp Clock http://www.douglas-...rclock/airclock.htmThe French were always innovators of gloriously designed eccentricity [xenzag, Feb 22 2020] // escape mechanism //
Sp. "escapement"
This could be an interesting constant-force energy source for a clock, so [+].
Also in the Museum of Retro Tech there's a whole gallery of "Oddly powered clocks" including several powered by changes in atmospheric pressure.-- 8th of 7, Feb 22 2020 //constant-force energy source// I'm not sure how you plan to keep the driving force constant, as it will tend to decline as the pressure falls. That's not a disaster (most spring-powered clocks and watches don't have a constant driving force), but it will affect the timekeeping.
You could always use a fusée, though, to recover a constant driving force.-- MaxwellBuchanan, Feb 22 2020 A slow moving wide area piston - or a diaphragm - driven by very low pressure air via a regulator, and gearing to a fusée as described. If the flow rate is low, there will be little energy lost in the regulator, and it can be valved by a cam on the fusée.-- 8th of 7, Feb 22 2020 random, halfbakery