Culpeper-Style Tripod Compound Microscope, c. 1735

Possibly by Matthew Loft, London. Octagonal oak base with drawer for accessories, 3 slender brass pillars support and pass through the stage, stage with 2 curved spring clips underneath and 9/10-in.-diameter aperture for Bonanni spring stage (included), outer 2¾-in.-diameter pasteboard tube covered in mottled black and white shagreen, inner draw-tube covered in green vellum with gold-tooled lines and inked focus lines, turned Lignum Vitae collar and upper parts, screw-on cap with brass sliding dust cover, overall height 15 ¾ in. With 1 ocular, 4 objectives (numbered with dots 1, 2, 3 and 5), live box, forceps and 6 bone slides in pyramid-shaped fitted 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)