Fliqlo Flip Clock
A flip clock screensaver for Windows and Mac OS X that tells the time against a black background in either a 12-hour or 24-hour format. Along with the format, the size of the old-fashioned flip clock can also be customized, from 25% to 125% of the original size.
Mac : https://fliqlo.com/download/fliqlo_171.dmg
Windows: https://fliqlo.com/download/fliqlo_133.zip