2 Prototype Stereo Cameras for Rollfilm

Both for standard 120 rollfilm, both shutters are functional. 1) For approx. 32 stereo images in 24 x 22 mm format, assembled from a Zeiss Ikon Ikonta 520/2 and a Revere Stereo Camera 33, Wollensak Amaton 3.5/35 mm. On the first pass of the film, 16 (or possibly only 15) stereo images are exposed at the top (the right image window has an additional notch at the bottom edge for left/right alignment, similar to the View-Master camera). Then, in the dark, the film is removed and turned over. Now, the previously unexposed lower portion is available at the top for another 16 images. Back with two modified film windows. No other rollfilm camera with this principle is known. (4/3) – And: 2) Joux, Paris. Alethoscope with Steinheil Munich Orthostigmat 6.8/95 mm, focusable, 3 apertures, original and removable front section (loosen 3 screws on the side), newly designed jumelle-type camera behind it, very lightweight and high-quality construction. (3-/3)

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)