hello. I found this old bike in the basement. Can someone help me find information about it? What company is it, what year and technology? is it worth anything?
Thank you for the additional pictures. The Falck decal indicates a German market bike. And indeed, there's a whole bunch of Challenger bikes on Kleinanzeigen.de.
Could it perhaps be the housebrand of a German chain store?
Although the bike was clearly built to a (small-ish) budget, a CrMo main triangle and forks are actually pretty decent.