Crosley Patent Telephone, c. 1880

No. 1115, wall model, walnut case, microphone with wood diaphragm and 4 carbon pencils, side contact in the manner of a Morse key, turned Bell-type receiver, 7 brass connectors, original components and wiring, brass plate with name of connector "Alex Bernstein, Berlin" (entrepreneur and owner of several patents, one of the first owners of a private telephone in Berlin). - Note: Crosley improved on David Hughes' invention of the simple carbon pencil microphone by using four carbon pencils to improve the sensitivity of the transmitter and the range of the sound transmission. Instead of only a few 100 yards, transmission of up to 8 miles was now possible. Crosley's microphone was used with the telephones manufactured by Blakey and Emmott, which were purchased in large numbers by the British postal service and were also used in other countries.

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)