It does seem that some early Spanish spike axes had that disc type head center early in 18th, but as always so much variation. They had shorter and downturned spikes.
The beveled feature at spike stem reminded me of some horsemans axes of S. Germany late 16th into 17th. which went in line with the overall finished and decorative character of weapons in these times.
As always, weapons tend to have as range in size, often aligned with physical characteristics and circumstances. I had thought with this example with the blade more in character with poll type axes and woodsman axes this would be large for spike axe, but that thinking seems incorrect.
Sorry to not be more help with the mark, but most of these seem to have been unrecorded, or with records long since gone.
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