Glad you asked. 
I’ve tried some of the usual patterns without the SEO-friendly parts:
https://web.archive.org/web/*/http://www.amazon.de/gp/product/B0038XB2R6
https://web.archive.org/web/*/http://www.amazon.de/dp/B0038XB2R6
Then Amazon redirected the Wayback Machine bot to the URL with SEO keywords.
Strange, I could find something:
https://web.archive.org/web/*/https://www.amazon.de/Curious-Thing-Amy-Macdonald/dp/B0038XB2R6
That must have been the userscript I’m using.