Bidspirit auction | Regulator marked ''ATO H&B'', circa

Regulator marked ''ATO H&B'', circa 19 - Regulator marked ''ATO H&B'', circa 1920, in a light-colored softwood case, faceted disc in front of the pendulum, domed glass in front of the dial, silver-colored metal dial with black arab. metal dial with black arab. numerals, blackened hands, movement with electrodynamic drive, function not tested, 50 x 25 x 13cm