A very scarce 1890s 4x5 plate unmarked American tailboard camera. In very nice condition with original brass lens cap. 

I have seen 3 of these in 30 years. One other can be seen here at Larry Pierce's site:

https://piercevaubel.com/cam/unknown/unknown13.htm

Larry writes: "Date Introduced: - ; Years Manufactured: c. 1890. Construction: rear focus via push-pull, no gears, no swing; not reversible; non-folding bed. Materials: main box looks like oak wood, base is cherry; black fabric bellows; brass hardware. Sizes Offered: 4x5"

"This camera looks similar to the E. & H.T. Anthony Eureka School Outfit. In detail, there are so many differences, it is obvious that it was made by a different manufacturer, perhaps a conscious effort to copy the Eureka."