Any one know of this lens? Early brass construction with waterhouse stops,inscribed"made by A.Krufs in Hamburg for Y.Spencer in Glasgow; No,2362". Appears to be of a three element ,or three pairs of elements construction. The two outside elements[or pairs] are separated by an element[or pair]in about the centre. Focul length is about 280mm and covers 10x8 with lots of movement. Overall hieght is 55mm ,front element is 37mm,centre element is 25mm and rear element is46mm. Sorry no pictures at the moment. I hope someone can help. Regards, Frank.
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