McHale and Co Mountaineering Backpack.
Believe its a Vintage Alpineer model. Royal Blue and Black nylon. Top pouch can attach in multiple positions depending on how much you are carrying. Top loading compartment and large zipper compartment on from. Sleeping bag holder and side pouches. I measure it a 42" tall at full extension and 48" circumference at the base.
I don't know anything about mountaineering but am happy to try to answer any questions you might have or send you more photos. I see prices all over for this brand so not sure what its worth. Make me an offer
