Parker Aerial Camera with Three Leica Lenses

USA. 35 mm, with heavy cast-metal body with raised lettering "Parker 1947", height 41 cm, two spirit levels for horizontal adjustment, double chambers for 30-meter spools, three Leitz Hektor 6,3/2,8 cm lenses (one for vertical work, the other two for oblique angles), Leitz New York Y-2 filters, Leitz caps and single shutter with short exposure time (working) and coupling for simultaneous use of all three lenses (stuck). - Parker and Bagley worked together from WWI onwards. Aerial cameras with multiple matching lenses require extremely accurate calibration and testing in the factory to ensure that their focal lengths are identical. - A rare opportunity to acquire three Leitz Hektor 6,3/2,8 cm lenses produced under the most exacting conditions.

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)