Hello
The gunsight looks like a Revi 4, and is effectively prewar (around 1935). Built by Nedinsco, the Dutch subsidiary of Carl Zeiss.
The stick seems to be a "standard" French SAMM 103, used on about every French military jet plane built between about 1955 and 1970, ranging from the Fouga Magister trainer to the Mirage III. A detailed view of the plate may give more informations, but not sure !
Have a nice day