>>1706132The pack is an East German Sturmgepäck. It's super convenient because it has clips that attach perfectly to the luggage rack - see pic. I had to look around for a bike with an appropriate rack (it's part of the frame, which is quite common for road bikes here), but once I'd found one it was like the pack was designed for it. I wanted a pannier I could turn into a rucksack without paying ridiculous Ortlieb prices, and I found a rucksack that works as a pannier and costs less than 5 euros.