This "item" is a toy, featuring a copy of a Leica, and a slideviewer. The slideviewer is in fact a wheelmechanism in the body itself, the releasebutton is used to turn the wheel, the images from the slideshow are african wildlifesecenery with, lions, girafs, elephants,... 6 pictures on the disk. I found this toy in a Buddhist temple in Nakhon Si Thammarat, Thailand. These temples are organising events, where families and children are welcome and this item is sold for children's joy. The toy is a replica of a Leica M8 or M9, with the Summilux Asph. M-lens, it's a 1:1 objective with a lens thread of 46mm, what the number 4135 means, I do not really know... There is even a random serialnumber on the lens. It has a black plastic body that isn't perfectly moulded and a bit out of angle. The paint is in a golden finish, but there where also models in green, blue and red. Made in China, retailprice 0,50 Eurocent.