Need help identifying a Swiss Shoulder Bag(pictures included)

I was at a gun show today, and decided to buy some very interesting Swiss Items. For 300 US Dollars I bought a K-31 made In 1949 with all matching serials and some Gewehrpatrone 11 ammo with stripper clips. I also got a very peculiar shoulder bag.




I would appreciate if someone could help me identify it. It says "FR. FRIEDLI 79 BÄTTERKINDEN" I'm not very sure what this means so I would appreciate some help identifying it.