Hugo Bunzel Vienna Arithmometer, c. 1905

No. 3726, engraved "H. Bunzel, Wien", spoked-wheel calculating machine for all four arithmetical operations, mahogany case with folding mechanism for tilting and setting machine at an angle, 8 input sliders, 8-digit revolution counter, 16-digit results mechanism, Bunzel patent clearing with 2 levers, writing field with slate surface, very good working condition. - Literature: Martin, p. 210. - Note: This machine is a Model 3, with mechanism manufactured by Arthur Burkhardt & Cie in Glashütte. Until 1903, Hugo Bunzel imported complete calculating machines from Burkhardt, engraved his name on the top-plates and sold them as his own products. From 1904 onwards Bunzel only purchased the mechanisms, while the cases and top-plates were made in Austria. - A great rarity.

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)