Let's suppose these are modern-made... Perhaps those punch marks are the result of toothed tongs used to hold the pieces while they were dipped in some acidic solution to artificially age them, or to remove them from said solution.
In either case, the marks are irregular enough to have been accidentally made. I don't think hammer blows would reproduce the relatively precise alignment of these marks.
These axes make for a nice little mystery, Fernando, regardless of authenticity.
Emanuel