I think it may be like the hobnails on an old Parisian street sweeper's boots, the points have simply been worn down by the cobbles on the Rue de la Paix.
Without pushing my pedanticity too far, a waffle dial would be the reverse imprint of the OPs dial, i.e.:
thus we get:
If anything, the OPs dial may resemble........
We could go on forever, there are many styles of guilloche patterns based on straight intersecting lines, and just as many opinions on what they are called.
If only somebody could author a definitive reference article all of these questions would be resolved.