Diehl Rocket Clock

This space-age clock almost certainly appeared in the late 50's, soon after the first satellites were launched.  The earth is reverse molded and painted on the inside of the clear plastic cover.  A tiny metal rocket endlessly circles the globe, each orbit taking exactly one minute.  It was made in West Germany by Diehl, and is powered by a single D-cell.  A conventional balance-wheel escapement drives the clock, but the spring is wound every few minutes by a tiny motor.  The rocket, itself, looks suspiciously like the WW-II German V-2.