Important Collectors Wristwatches, Po...
Geneva, Nov 14, 2009
LOT 233
Rock Crystal Watch with Stackfreed Attributed to Conrad Kreizer, (Augsburg), German. Made circa 1600. Fine and extremely rare, small rock crystal, gilt metal and pre-balance spring, singlehand pendant watch with stackfreed and polychrome champleve enamel silver dial.
CHF 40,000 - 60,000
USD 40,000 - 60,000 / EUR 27,000 - 40,000
Sold: CHF 48,000
C. Two-body, octagonal, deep back, cut from a single piece of rock crystal, faceted on the sides and the back, hinged rock crystal front cover similarly faceted with small central finial fixed to an engraved gilt bezel, small tulip pendant and turned spire finial with pierced and engraved scroll feet. D. Octagonal, silver, chapter ring with champleve enamel radial Roman numerals with half-hour divisions, the border and center decorated with polychrome champlevé enamel flowers and leaves. Engraved gilt foliate hand. M. Oval, 26 x 22 mm, gilt brass full plate, column pillars, fixed barrel, C-shaped stackfreed, short three-wheel train pinions with 6 and 5 leaves, verge escapement, circular steel foliot, adjustable pivoted lever for hog?s bristle regulation, small brass S-shaped cock with wide pierced and engraved foot secured by a screw. Dim. 50 x 27 mm.
| Grading System | |
|---|---|
Grade: |
|
Case: 3 |
Good |
Movement: 3 |
Good |
Dial: 3-25-28-01 |
Good Chipped Replacements HANDS Original |
Notes
The Stackfreed Was designed to equalize the varying force of the mainspring. This was necessary because the rate of the foliot?s oscillation depends directly on the force with which the escape wheel acts upon it. In a watch, the force transmitted to the escape wheel when the watch is fully wound is about twice that of when it is nearly run down. The need for an equalizing device was realized early on in the development of horology and the stackfreed was a crude but relatively effective method of achieving this. It was only made for a relatively short period before being superceded by the fusee. In a 26-hour watch, the action of the stackfreed spring causes a constant high friction for the first 12 hours after winding, a slowly diminishing friction for the next 6 hours and a rapidly diminishing friction for the next 6 hours and no friction during the last 1 or 2 hours. This action agrees roughly with the variation in force of a coiled spring. The stackfreed is only found in watches made in Germany and continued to be used there into the 17th century even after the introduction of the fusee.
The Kreizer (also Kreiser & Kraiserer) Family. The Kreizer family was a veritable dynasty of watchmakers, with at least four individuals apparently bearing the same Christian name. Some uncertainty exists as to whether Conrad III and IV were not in fact the same person, but certainly one of the Kreizer's occupied the position of clockmaker to the Knights of the Grand Cross of Malta and indeed several watches use their characteristic cross as the form for the pendant. The Metropolitan Museum of Art has a cruciform watch by him. Another one, in an octagonal case with eight pronounced lobes, was sold by Antiquorum, Geneva, October 1995, lot 841.