That's a French army bag used by the 'chasseur alpin' ...the mountain branch of the army..
for some reason they're not very popular here, I've never seen one in the flesh so can't comment on the build quality & there's precious little info about them on the net.....I can tell you though that they sell for peanuts...for example...http://cgi.ebay.fr/SAC-A-DOS-renfor...6?pt=FR_JG_Sports_Camping&hash=item4845ba1d3c
Good gosh, cheap as chips, I've asked for postage costs and I'll buy one. Don't need one but at that money its worth a punt, thanks for the link