The strap was ordered to replace one that I used to have that was supplied new with the rucksack when I bought it in 1991. One part of the strap was lost and I don't know what happened to it. I took it off to clean the rucksack then either forgot to put it back on, or possibly I did put it back on, but it then fell off. Either way, half the strap was missing. I ordered the replacement and it is perfect - and I can see that the design has changed slightly, as it now has an elastic section which the old one did not.
I am perfectly happy with it - I would rather that I had not lost the original, but it is good that you were able to supply a replacement.