Boker's official marketing rep here says straight-up that Magnum knives are 440A and Boker Plus use 440C.
Boker's late warranty and repair specialist Terry Trahan also said likewise.
It is likely that Boker, when they were establishing deals with their Chinese manufacturers, required that the blade steel meet the standards for 440A and 440C, instead of using the original 8Cr13Mov or 9Cr18Mo. There is no reason that Chinese steelmakers wouldn't be able to do this and no one has provided a shred of evidence that Boker's steel is anything other than what they claim to be.
Boker's late warranty and repair specialist Terry Trahan also said likewise.
It is likely that Boker, when they were establishing deals with their Chinese manufacturers, required that the blade steel meet the standards for 440A and 440C, instead of using the original 8Cr13Mov or 9Cr18Mo. There is no reason that Chinese steelmakers wouldn't be able to do this and no one has provided a shred of evidence that Boker's steel is anything other than what they claim to be.