Group of Telegraph and Telephone Accessories, 1860 onwards

1) Cathedral GPO Telegraph Signal Indicator & Galvanometer, British General Post Office. - 2) Cable key with locking mechanism, E. Ducretet, Paris, 2 buttons, lacquered brass. - 3) Switch for 2 lines, circular walnut base (damaged), Ø 4 in. - 4) Galvanoscope, probably by W. Gurtl, Berlin, 1879 onwards, according to the specifications of the German empire telegraph administration. - 5) S.G. Brown's Telephone Relay, London, mechanical amplifier, patented 1909. - 6) Camelback key, c. 1860, very early Austrian model, with plug board to increase the voltage, polished brass, on walnut plinth. - 7) Bunnell telegraph sounder and Morse key on board (KOB), c. 1890, used as training set. - 8) Milliampere meter by Chauvin & Arnoux, Paris, brass case, Ø 2 1/3 in., in walnut box. - 9) Morse key, probably Germany, no. 34249, polished brass, on walnut base. - 10) Galvanometer, France, under glass dome. - And: 11) Relay, GPO, British General Post Office, no. 19602.

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)