Large Collection of Calculating Devices

1) "Animated Transparency Slide Rule", U.S. Naval Training Device Center, for overhead projection, 1958. – 2) "Otis King's Pocket Calculator", c. 1930, logarithmic pocket drum calculator. – 3) "Gerber Graph analogue" model GA-103, with variable scale. – 4) "Darnley's Patent Rotatable Lightning Calculator", England. – 5) 4 slide rule pens: "Roller Rule", "Magic Multiplying Pencil", "Chicago Recording Scale" and "Nicolet Slide Rule Pencil". – 6) "Faber-Castell Projektions-Rechenstab", model 310/87, c. 1965. – 7) "Corona" lighter with slide rule, Japan, c. 1970. – 8) 20 slide rules, including Keuffel & Esser desk model and 2 Keuffel & Esser large-size models, length each 22 in. – 9) "Paisley Calculator", model A, USA, c. 1940. – 10) 8 abaci, including Sharp EL-8048, with electronic calculator. – 11) 17 disk adders and simple calculating devices. – 12) 3 boxwood measuring bars. – And: 13) "Lawrence Secret Code Maker".

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)