The Rohrbach Ro.XI Rostra inside the Rohrbach factory [Germany, 1928]
A relative rarity, a photograph edited around 1928 in the proces used in that time. Probably the editors of the magazine wanted the Focus just on the hull and the two engines set high above the monoplane wing. The process used was to paint the 'inneeded' parts away with some sort of white water paint. Also the new format is given (11,7 cm) which is lined by big (white) stripes.
This was a customary technique in use for editing pictures at the time. If anybody has more on this technique or can hint to some literature I would be very obliged.
The water paint is brought on very precisely with a brush I think .... but it can be removed as we will see. This is forerunner of the idea of non-destructive editing of pictures with the use of layers as in Photoshop and equivalent software packages.