Early North American Field Camera, 1870 onwards

Probably August Semmendinger, USA, his model Excelsior. Rigid baseplate size 15.5 x 45.5 cm, no manufacturer's markings, coarse focusing with locking screw and fine adjustment screw, focusing screen for exactly 129 x 130 mm format, interchangeable plate holder with threaded mount for vertical adjustment, unmarked Petzval-type lens 3.4/18 cm with 4 matching Waterhouse stops, lens glass in good condition under point light, tiltable focusing screen, which folds out to the side; two pins at the bottom for attaching a film holder. The camera was likely restored or simply cleaned about 30 years ago; good condition. Rare camera by a known camera manufacturer

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)