Early Fusee Musical Clock Base, c. 1820

No. 1615, playing four airs, with 62 finely-cut teeth arranged in pairs in chevron-form sectional comb (complete), brass bedplate, fusee spring, winding arbour with integral Geneva stopwork, sprung side-mounted change/repeat control, stop/start with brass pad for linkage to clock, additional front-mounted stop/start and instant stop controls, in bookmatched flame-mahogany-veneered base with bun feet and cover, wd. 19 7/8 x dp. 9 ¼ in. (50,5 x 24 cm), cylinder 6 3/8 in. (16,4 cm). With associated winding handle. - A peculiarity of this movement are the three (instead of the customary two) gears of the governor train. Arthur Ord-Hume illustrates a movement with similar features in the base of a London-made Parkinson & Frodsham clock, noting: "Three wheels mean that the endless screw is driven upwards, so lower bearing has steel bearing plate". - Literature: Arthur W.J.G. Ord-Hume, "The Musical Box", p. 88, plates 37-38. - A particularly fine and early movement, in excellent unrestored playing condition.

布雷克拍品等级是为了方便竞买人判断拍卖品的成色而设置的。布雷克等级用1到6级来标注外观和功能的成色，(从非常好到非常差)。 在目录图册里用括号里的2个数字来表示，前一个数字表示外观成色的级别，后一个数字表示功能成色的级别。如(3/2)表示外观成色是3(满意的)，功能成色2(好)。 成色 定义参照下列标准： 1 - 非常好 (未使用过，没有使用痕迹) 2 - 好 (新，极少的使用痕迹) 3 - 满意的 (普通的使用痕迹) 4 - 及格的 (明显的使用痕迹，某个非主要部件是后配的) 5 - 有缺陷的 (极明显的使用痕迹, 某个主要部件是后配的，功能上有缺陷，需要修理) 6 - 非常差 (严重破损, 缺少重要部件)