Yes. Böker Magnum is covered by the same limited lifetime warranty on material and workmanship to the original owner that applies to Böker and Böker Plus. Magnum being the entry-price line does not put it on a lesser warranty.
Magnum is Böker's value-tier collector and outdoor line, produced outside Germany. It shares the parent company and the warranty program with the rest of the family.
That is unusual enough to be worth stating. Plenty of brands run a reduced warranty on their budget line.
Defects in material and workmanship, to the original owner. Normal wear, sharpening and misuse fall outside it, as with every warranty in this category.
Our brand reference records the Magnum line at medium confidence because Böker publishes less about it than about its other lines, so treat the maker's own service page as the authority.
Böker USA, Inc. of Denver, Colorado is the US contact. Start at Böker's service page below.
Warranty terms are set by the manufacturer and can change. The maker's own warranty page, linked below, is the authority. We repeat what it says; we do not extend it, and a retailer cannot promise coverage a manufacturer has not offered.