Polish pre war backpack

[Janek79]

I just found this backpack,
If anyone could shed more light on this backpack I would be very greatful.
Thanks
Janek

[Tomasz70]

It is standard wz.1933 backpack. Almost the same model was manufactured after the war in 50' / 60' with some differences :
- pre-war example had tea green shade and post-war was of darker green,
- post-war had an additional pocket inside for spoon/fork.
Your example looks unusual as most of the pre-war items were clearly signed by manufacturers and army with red ink stamps inside under the flap.