3 Brass Microscopes

1) M. Pillischer, London "The International", c. 1870, no. 3102, original lacquered brass, 90˚ tilting tripod, concave mirror, substage pinhole diaphragm, sliding tube, coarse adjustment with 2 knurled screws, micro­meter thumbscrew fine adjustment on the column, 2 objectives, 2 eyepieces, height of the instrument 9 ½ in., in matching mahogany case. - 2) Retailer’s mark on the claw foot: "Carpenter & Westley, London", c. 1895, tilting stand, original lacquered brass, concave mirror, substage pinhole diaphragm, 2 clamps on the stage, coarse adjustment with 2 knurled screws, fine adjustment to the objective, tube screwed into the arm, 1 eyepiece, 3 objectives, in matching mahogany case, height 12 ¼ in. - And: 3) Unmarked, original lacquered brass, black-painted cast-iron foot, concave mirror, pinhole diaphragm, draw tube coarse adjustment, fine adjustment screw on the column, 2 objectives, 2 eyepieces, reflected-light magnifier, height 10 in., in matching mahogany case.

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)