6 Brass Microscopes

1) English compound monocular microscope, c. 1850, marked: "John Browning, London, 194", lacquered brass, extended height 7 4/5 in. - 2) Drum-type microscope, unsigned, original finish, height 6 in., in box. - 3) Student microscope, unsigned, green-painted iron base, original finish, height 10 in. - 4) England, c. 1860, unsigned, iron base, tilting stand, rack-and-pinion coarse adjustment, body tube with milled-head fine adjustment threaded into the arm, 1 eyepiece, 1 objective, height of instrument 12 ½ in. - 5) Student microscope, c. 1910, black-painted iron base, original finish, rack-and-pinion adjustment, 1 eyepiece, set of 4 threaded objectives, height 7 ¼ in., in box. - 6) E. Leitz, Wetzlar, c. 1900, no. 58586, polished brass, sliding tube, fine adjustment with knurled screw, 1 eyepiece, 1 objective, pinhole disk, double mirror, height 10 1/5 in. - And: 7) 1 pocket microscope, 1 bull's-eye lens and 3 Chevalier objective lenses in brass containers.

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)