Max Lenz Thirty-day Floor Regulator

Max Lenz Thirty-day Floor Regulator, Vienna, fully engraved two-piece brass dial with enamel roman numeral cartouches, subsidiary seconds dial marked Max Lenz , Wien , long duration, time-only movement with deadbeat escapement, maintaining power and crutch beat adjustment, powered by an engraved brass-cased weight and regulated by a temperature compensating gridiron pendulum with similar engraving, crenulated flat-top case, hood door with engaged columns, carved waist door with lenticle, base door flanked by columns, all on mushroom feet, ht. 89 in.