TURMUHR Circa 1630 Germany
The day-going spring-driven iron and brass movement consists of going, hour-striking, quarter-striking and alarm trains. The going train has a spring barrel with gut fusee, and a verge escapement with balance wheel. The quarter-striking train is regulated by a count wheel. After the quarter striking, the hour striking, also regulated by a count wheel, strikes the hours.
The front plate has two silvered dials. The larger one has a Roman hour ring I-XII, with an inner Arabic ring 13-24, surrounded by a bezel with touch pins to allow ascertaining the time in the dark by feeling. There are half-hour markers between the hour numerals. In the centre is an alarm disc with every hour marked by Arabic numerals 1-12 around a beautiful sunburst engraving. The time is indicated by a blued-steel. The smaller dial has Roman quarter indicators and a blued steel hand. The rear side has two dials, the upper one indicating the position of the hour-striking train, whilst the lower one indicates the position of the quarter-striking train, both with a blued steel hand.
The firegilt brass case has four moulded and gilded feet. The case is richly engraved with flower and scroll motifs and has removable side panels on two sides to allow access to the movement. The four corner pillars with sleek capitals stand on gracefully engraved bases. Each corner of the top plate is decorated with a beautiful stylised vase. The structure of the top consists of three floors, consisting of two open-work cylindrical sound apertures, the lower one for the hour bell and the upper one for the quarter bell. Each floor is embellished by finials, while the dome is surmounted by a stylised pagoda. On the top of the base plate are two punch marks of a bird and the letter M, most likely those of the case maker.
Duration 1 day
Dimensions: H. 40 x W. 20 x D. 20 cm.
Klaus Maurice, Die Deutsche Räderuhr, Band II, p. 26, Figs. 121, 122a, and 123.