An okay looking model E. the front screws are replacements, they should be slotted and nickel plated. The real question is: are the guts there? Curious how an E, without knowing what's really going on with it, makes out.
note: the model E and F are identical, other than markings. The valve configuration, if you are not already aware, is an odd folded metal arrangement that is essential to the guns operation, is impossible to source, and, at least so far, impossible to reproduce. These are really fun guns and well worth the effort of getting them going, which is actually pretty easy. Be sure to check in here about disassembly, there's an essential trick, never force anything!
http://www.ebay.com/itm/ANTIQUE-BENJAMI ... 2863662530