Calculating Machines and Calculating Aids

1) American Adding Machine 0, 1913, manual American adding machine rarely found in Europe, with 7-row setting slides and keys, finger recesses for key setting and 7-digit result mechanism. Manufacturer: American Can Company, Chicago, USA. – Literature: Martin, p. 298. – 2) Corema Portativ, Swiss adding machine, lever broken, in box. – 3) Stima, c. 1930, flat Swiss miniature adding machine with rack and pinion and direct display, with case and pen. – Literature: Martin, p. 454. – 4) Addipresto, 1960 onwards, toothed disc adder with pin setting, Italy. – 5) Master Multiscriptor, 1934, number slide, Belgium, with illumination. – 6) Addometer, American 8-disc ruler adder with case and pen. – 7) Minerva B7, c. 1930, toothed disc adder, mechanism hooked. – 8) Thales patent adding machine, lever missing. – 9) Otis King, c. 1920, logarithmic pocket calculator with double telescopic extension. – 10) AS7, toothed disc adder, defective. – And: 11) George Fuller's calculating drum, 1889 onwards, manufacturer: Stanley, England. Roller length 12 in., with wooden handle, in 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)