The N-1B flew in 1927, which was the precursor to the N-2B. Hopelessly under powered with a 220 h.p Wright J-5 pusher only six were produced before moving on to the N-2B Neptune in 1928. About 40 in total were produced the first sixteen of which had an open cockpit before the adoption of an enclosed cockpit. I think that the photo on this page is of the later N-2C which featured a 450 h.p Pratt & Whitney pusher.
Power plant 1 x 300 h.p Wright J-6 pusher
Span 40'0" Length 31'0"
Range 400 miles