French Drum Microscope by Oberh?user, c. 1840–45

The smallest microscope offered by Oberh?user, "microscope pour hospices", box with embossed serial no. 1050, original lacquered brass, drum stand with a concave mirror, height 11 ? in., three multi-part objectives (two of them in bone boxes marked No. 4 and 8), two eyepieces (Nos. 3 and 4), double sliding tube, fine adjustment with lateral knurled screw under the table, (the table lifts up), the base can be quickly attached to the box in the brass holder. Although unsigned, this is clearly a device from Oberh?user's workshop. Brass base on top with a dedication to the Austrian professor of anatomy Carl von Rokitansky: "Meinem lieben Freunde Galatti zur Erinnerung an meinen seligen Vater – Hans Rokitansky". Visually and technically in good condition, in its original box, box lid with original turquoise silk upholstery.

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)