3 Microscopes

1) Compound monocular microscope, c. 1880. Signed at the base: "Henry Crouch, London", serial no. 4805. Lacquered brass, black japanned English base, double mirror, tilting stand, sliding body tube, double milled-head rack-and-pinion coarse adjustment, screw fine adjustment on top of the limb, double nosepiece, 2 oculars, 1 objective, height 11 ¾ in., in mahogany case. (3-/3) - 2) German monocular, c. 1920, Otto Himmler, Berlin. Nickeled and black-japanned iron, double mirror, draw tube coarse adjustment, milled-head screw fine adjustment, substage pinhole diaphragm, 2 oculars, 2 objectives, height 11 ¾ in., in wood case. (2-3/2-3) - And: 3) The 'Star' Microscope, c. 1895, signed at the foot: R. & J. Beck, London, serial no. 21056. Oxidized brass, double mirror, substage iris diaphragm, sliding coarse adjustment, screw fine adjustment, 2 oculars, 2 objectives, height 10 1/5 in., in wood case. (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)