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Item Name : Queens Co. Philadelphia 20cm f4.2 Petzval Brass Lens Perken Son & Rayment Portrait 7x5 Brass Petzval Lens
Serial no. :
Reference : James W. Queen & Company was an optical and scientific instrument company,active in various forms from 1853 to 1925, and subsequently as Gray Instrument Company until 1952,n 1853 Mr James W. Queen began in the city of Philadelphia a small business in optical and philosophical apparatus. In 1859 he joined with Mr. Samuel L. Fox, and under their personal supervision and management, the business steadily developed. In 1870 Mr James W. Queen retired, and Mr. S.L. Fox continued the business under the title of James W. Queen & Co. It continued under this name until 1893, when it was incorporated as Queen & Co. John G. Gray reorganized the business in 1912 under the name Queen-Gray Co., and it remained that way until Mr. Gray's passing in 1925, at which point it changed its name to Gray Instrument Company.
Glass Description : Rare !!,focal length around 20cm,barely cover 5x7in,length with hood 113mm,barrel diameter 60mm,front element visible diameter 47mm,rear element visible diameter 55mm,very very faint cleaning marks,one 1mm very faint colourless spot inside front group element, no haze,very nice build because each single piece rear element protect by metal rim to prevent damage
Remark : W/Hood
Cosmetic Condition : EX++
Price : $