The German design was a classic in Europe but not very useful here.
People like Paddy Palin took that design and modified it for our conditions - more rain than snow, thick scrub rather than open forest and alpine meadows, jungle to desert not just temperate or snowy peaks.
The mods included heavier canvas, more contoured and longer lids to protect contents, a bit less leather, larger volume for real expedition load carrying.
A few bushwalking club members still used them back in the 80's when first generation synthetic packs started to be cost effective and more robust. But the old packs were more nostalgic than useful even then - heavy, uncomfortable, lousy frame, and the skinny leather straps were always a weak point.
It didn't take long for them to be relegated to day walk use or put up for sale in club magazines.
Strapping stuff on the outside of packs is personal preference, but it's very risky - damage/loss of gear, leaving bits of junk in the bush, etc. The only time stuff is typically on the outside is above the tree line in snow conditions.
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Background to picture looks very un-Australian!
Hard to tell quality unless close ups of stitching, interior and ventral side of pack.
KB
Looks like pretty much all plantation forests that I have been in in Australia, but I agree in that it isn't native bush.