Scanned from a snapshot in a photo album from Norway from 1928
A Hansa-Brandenburg W.33 of the Royal Norwegian Navy Air Service
The W.33 was designed by Ernst Heinkel in 1916 and entered service in 1918 shorty before the end of hostilities in WW1.
The Norwegian Naval Flying Boat Factory built 30 W.33's under licence in 1922 and they remained in service until 1935