Early SLR, 1890 onwards

Probably England. Flat, very compact and light SLR made of dark walnut with focal plane shutter (probably fixed slot width), suitable for very short focal lengths from 12 cm to infinity, with Meyer Aristostigmat 7/120 mm no. 5903, the recording format on the focal plane shutter is 8.5 x 11.3 cm, the inserted double cassette has the format 8.2 x 10.5 cm, the brass fittings used are standard fittings of the time with the exception of the gears and the shutter release mechanism. It is possible to operate the shutter and the mirror mechanism very carefully, but one crossbar is very fragile. The extension is 4.5 cm, the external dimensions are 17 x 17 x 11.5 cm. – Possibly a hand-made sample created as a first test model and used extensively to obtain material for further improvements.

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)