Detective Camera, c. 1880–90

Bowler with built-in fixed plate camera for glass plates of 26 x 38 mm, guillotine shutter, released by pulling a cord hanging out at one side of the hat, fixed focus lens. Hat interior embossed: "The 'Ideal' Hat – Easy Fitting 6 ½" as well as a sticker "Gaumont". Size of the hat 11 ¾ x 9 x 6 in. With metal box. – Excerpt from "Antique Cameras '78" by Uwe H. Breker, Cologne: "Up to now, it has only been known from advertising and patents that various hat cameras must have existed in the second half of the last century. Therefore, this is the first time that a picture of an original hat camera can be shown."

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)