This is some homegrown idiot's project to cut notches into an otherwise normal razor. In looking at a selection of Burrell razors, this aberration is not seen on any of them. I don't believe this razor was commercially produced in this configuration. The teeth are of varying depths and widths and only cover two-thirds of the blade. And futhermore, it is irresponsible of the seller to fabricate such a stupid description.
Regards - Walt