Cox London old brass lens with rack focusing. Reg No.1744. Made in England For Sale

An vintage/old (probably over 100 years old), well made, quite rare, Cox London Reg No.1744 quite large brass lens with rack and pinion focusing.The lens has some internal dirt spots inside but fairly clear, the focusing works okay, the lens diameter is approx. 4 cm front and rear, its max. diameter is 9.2 cm and is 12 cm long including the built in lens hood. Cosmetically it is in a fair condition, no damage. Made in England, not sure what it was used for but probably a projector.Payment by Pay Pal please