Measuring and Drawing Instruments

1) 13 brass protractors, mostly 19th century, from England, the Netherlands, France and Germany. – 2) 2 protractors with a proportional scale and pointer arm. – 3) Curved ruler, engraved with D.R.G.M. 404786. – 4) 6 small vernier calipers, metric scales. – 5) 4 folding rulers, brass, 3 of them metric and one with a Munich inch scale. – 6) 2 folding rulers, wood, 1 of them with a metric and Rhenish scale. – 7) Miniature folding rule, length 50 cm, marked ‘Demi Mètre V2’. – 8) 4 folding rulers, c. 1900, each folding four times, boxwood with brass hinges, two from the USA and two from England. – 9) 3 folding yardsticks made of bone, c. 1820, double or quadruple-folded, one of them with Rhenish and Parisian scales. – 10) 2 yardsticks made of ebony, c. 1840, with brass markings, in eight and six sections. – 11) 2 slide rules, lengths 5 ? and 10 5/8 in., in slipcases. – 12) 3 curve rulers, in boxes. – And: 13) 14 rulers and other items.

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)