Franciscus Seiffner Mahogany Floor Standing 8 Day Astronomical Regulator, c.1830. 11 in. porcelain astronomical dial signed "Franciscus Seiffner, fecit Pesthini" has sweep seconds, jump back 31 date center calendar, sub dial with hours and minutes, sub dials for days, zodiac and 4 seasons; quality gilt brass hands and gilt brass door bezel over the dial and behind the mahogany case bezel. Heavy quality brass 8 day weight driven movement with recoil escapement, heavy solid brass pulley with brass covered weight, miniature weight providing power to the calendar, and quality brass pendulum rod with brass covered bob. In a floor standing mahogany case in the form of a large turned and fluted column with gilt wood reeded striping at the bottom, drum head top under a turned and gilt carved finial and gilt carved feet. Running, case in good general condition with enhanced original finish, missing interior bezel crystal, hairline in left side of viewing door glass, missing bezel lock; has winding key. 87 in. high x 21 in. wide x 11.5 in. deep.