Forget the Nixie Clock on top and the Fallout-esque image we're looking at. Cuckoo BirdThree inch cuckoo bird that opens its mouth when the tail is lifted. Great selection of clock making supplies, fit-ups, movements, dials, hands, numerals, pendulums. Atmos clocks.to me these clocks breath Art, Art Deco, Architecture, with their cool appearance that has hardly changed since the. Check out our revolutionary side-by-side summary and analysis.