Skull hilt on Napoleonic blade-Masonic?

[Jim McDougall]

Something a little unusual. Years ago a query presented this unusual sword, and of course asked what in the world is this? It was a large brass sheet work skull (reminded me of an Indian pata or gauntlet sword) but was mounted on a long straight blade....appearing to be French cuirassier ANXI .

With my lifelong affinity for 'pirates' of course, like many, my flights of fancy went right to virtually every corner of pirate lore, and the sword of the dark pirate scoundrel captain. There have been many fanciful suggestions that the 'Jolly Roger' was related to Masonic symbolism.

Returning to reality, and rational thinking.....the only solution I could come up with was perhaps, this bizarre weapon was an innovative Masonic creation.
Thinking of Masonic tradition, the skull and cross bones are of course highly symbolic in the 'memento mori' (inevitable death) concept, and there are cases of some Masonic swords and daggers with pommels with a skull and bones.

The blade (these pics are from many years ago) as far as I can tell appear to be from a cuirassiers sword ANXI of French cavalry.

I have always thought (regret that I did not get this anomaly) that possibly this was a heirloom or trophy blade, which might have been used to fashion this unusual example of edged weapon curiosa into this example.
It seems through the years, I have come across various examples of venerated old swords that had come from previous wars and campaigns
serving as 'TYLERS' swords in various lodges.

While the traditions usually specify the 'flammard' or wavy blade of Biblical and chivalry history, it does not seem that was necessarily the case, and many variations of sword were substituted.

Just thought this unusual example of sword curiosa might be interesting, and Id like to hear if anyone alse has seen such an example, especially in recorded Masonic use as described. Masonic swords have become increasingly popular among collectors after the book on American Fraternal Swords by Joe Marino & James Kaplan. However this example may well be French or British.