There are many variants of the C64, even if you don't count the country differences. Same thing goes for the variants of the 1541 drive. There is the VIC 1541 in VIC 1541 box, there's an "Alps 1541" with the newer box but it came with the old manual, there's the Alps 1541 in the newer box with the newer manual, there's the side-hinged 1541, etc. Obviously they bought things in bulk.