Scovill & Adams offered its 4x5in Waterbury Detective Camera, improved model, ca. 1892. The camera has a quite simple shutter and a reflecting type viewfinder. It resembles earlier box cameras of Scovill, for example the one with focusable back which was designed by Willard H. Fuller and described in a patent of 1888.
- 1888 patent of preceeding box camera model with similar lens/viewfinder arrangement at Google patent search