Year and manufacturer of this Jack Thwaites pack

A while ago I wrote up an article about Jack Thwaites over at Our Hiking Blog: http://ourhikingblog.com.au/2010/02/jac ... alker.html
There were a couple of images (used with permission) of his backpack in the article.


I just had a fellow from Wales post a question there.
I could not help him out but thought some of the knowledgeable people here might be able to help out Neil.
Does anyone have any background on these packs or suggestions where to find more information?
Thanks in advance
Frank
There were a couple of images (used with permission) of his backpack in the article.


I just had a fellow from Wales post a question there.
I was just wondering if you knew anymore about the backpack pictured on this page with the cane frame. I live in Wales in the UK (the Old South Wales!) and found one identical whilst clearing out the loft. Any information such as maker and year would be great!
Thanks,
Neil
I could not help him out but thought some of the knowledgeable people here might be able to help out Neil.
Does anyone have any background on these packs or suggestions where to find more information?
Thanks in advance
Frank