Prentiss 30 Day “Empire” Calendar Wall Clock. Prentiss Improvement Clock Co. 30 Day Empire Model Calendar Wall Clock. 9 in. painted metal dial signed “Prentiss Calendar & Time Co., New York”, has black Roman hour numerals and blued spade hands. 30 day, quality brass double spring driven time only movement has a solid brass front plate, pierced iron back plate and Graham deadbeat escapement, long drop pendulum has a wood stick and engraved brass covered bob; movement is numbered 3298 over Pat. Dec. 10, 1889 over Model 812. The center arbor of the movement has a “snail” gear connected to a rod which lowers to trigger the release lever on the top of the calendar mechanism, once a day the release lever is engaged which rotates the calendars “day” cylinder and the 31 date rotary “flick” card style mechanism with operates on a separate spring; the month and day barrels have a polygon form and retain their original paper labels. In a beautiful oak case titled “Empire”, has a carved crest with raised paneled corner spandrels around the door bezel; the lower drop section has 3 inset glass apertures exposing the day, month and date labels of the calendar mechanism; the entire front of the case slides off for easy access to the interior of the clock. Refinished, running and in very good overall condition. Calendar mechanism with patent dates over Model No. 217 and serial number 3199. Measures 37 in. high x 14 in. wide x 7 in. deep.