A Truly Exceptional Stereoscope Illustrating Camera and Lens Man

Weizs?cker, Stuttgart. Foldable rollfilm stereoscope, with a 12 cm wide, interchangeable film strip inside with 54 stereo images, featuring excellent explanatory images of the manufacturing process for lenses and cameras at Voigtl?nder in Braunschweig during the early 1950s. Viewing the images is possible with a little assistance. Looking at these images reveals the answer to the question "Why is this lens so good?", and, in particular, why the merger with Zeiss occurred, thanks to this dedicated workforce. Some manufacturing steps have never been illustrated in technical literature before. The series begins with a test projector, then glass block sawing, thickness measurement, polishing, lens element assembly, grinding, precision polishing under protective cover, testing, assembly, lens mounting, painting, a test room with four collimators, a lathe department, an assembly hall, stamping, machining, drilling, milling, electroplating, metal polishing, painting, drying, final assembly, stamping, engraving, testing, final inspection, packaging, and a display case for the production line. From the golden age of the German economic miracle!

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)