Cap'n, thank you so much for showing this boarding axe, and for the excellent information regarding these tool/weapons. While I have not studied these in any depth, your great presentation has totally piqued my interest (you'd think you were a writer or something!
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The resources you have cited are of course ideal for information on these, but I thought to consult one other, as these once off the vessels, often found their way into trade stations and in degree into American Indian tribal context.
That is "American Indian Tomahawks", Harold Peterson, 1965 (p.140, #312) which is a French boarding axe (as you have described) M1833. Though these were often diffused into the Indian trade, apparently the influence remained present for continued production of such axes for American naval use into the Civil War.
It is so interesting to see the actual utility use in which these were employed, and that the spike was used to dig out 'hot shot' imbedded in the wood of the ship as an incendiary. While I can understand the use of the blade to chop through rigging and broken wood, that dynamic I had not thought of.