4 Brass Lenses from England

1) Watson & Sons. "12 x 10 Premier", c. 1875, no. 5510, probably an aplanatic lens, iris stop (stuck), approx. 45 cm focal length, height approx. 6 in., lens diameter approx. 2 ¾ in., light dent in rear lens mount. (3/4) - 2) Early landscape lens from England, c. 1865, unmarked, approx. 12 cm focal length, for 6 x 9 cm cameras, for waterhouse stop, with slot on front, height 2 in., Ø 2 in., connecting ring Ø 2 ¾ in. (2/2) - 3) Charles Cheetham Vevers. "C.C. Vevers Leeds ½ Plate", c. 1900, lens with focal length of approx. 25 cm, rotating stop, height 2 in., Ø 2 in. (3+/3+) - And: 4) Watson & Sons. "4.2 in Holos Wide Angle", convertible lens, c. 1910, no. 2696, front lens with engraving "Front 8 in", back lens with "Back 6 ¾ in", thus the lens could provide 3 different focal lengths: 4,2, 6 ¾ and 8 in. With iris diaphragm and 2 aperture scales, height 32 mm. (3+/2-3)

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)