The Besson MB.35 "Passe-Partout" and its derivatives MB.41 and MB.411 are French observation seaplanes designed to operate from the submarine cruiser Surcouf.
Two MB.35 prototypes were produced, one of which was lost by accident, and the second was converted into the MB.410 prototype was...
http://3dhistory.de/wordpress/warship-drawings-warship-blue-prints-warship-plans/french-submarine-drawingsplan-sets/french-submarine-surcouf-as-build-1929/
It's the sous marin de croisière type Q5 concept for the Surcouf.
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