The new piece added by Breguet (#500-4) shows at least the contours of the biplane. Picture is taken from behind, showing the biplane with a gondola ('bathtub') type mounted on the wing. Further a completely open tail construction.
An engine with a big square radiator can be 'clearly' seen between the wing, so a conclusion can be that we are looking at a two-engined machine. I cannot discern if it is a twin-engined pusher or tractor.
So my idea is that it is an early (1913-1914) two-engined biplane with a central gondola.
The horses are not very special, well they are horses
Cheers
Kees