Up for sale is a Spencer branded projection lens with the focal length of 16" according to the barrel. This lens has a small crack on one of he inner elements, it has not been tested to evaluate potential impact on the images. 

The lens is 5.5 inches long with a 4 inch diameter. The glass is around 3 3/8ths of an inch in diameter. 

Lens is jus over 3 lbs.

Sold as is for the DIY large format enthusiast.