I rest my case Fernando! Your detailed and itemized assessments reveal the depth of the knowledge you have absorbed on these topics through your consultations of these references. I know that I am also very much a 'browser' rather than reader.
I would note here that your 'sentimentality' in estimating the origin of this bayonet is probably well placed, even without distinct or specific evidence.
In my view, subjective observations and are profoundly important in the absence of more definitive evidence, especially when rendered by those with profound experience and tenure in a certain field.
While my suggestions toward possible ceremonial or Masonic connections is admittedly tenuous, it was noted as an interesting possibility. However I am inclined to agree more with your well reasoned and explained thoughts.
There is a lot to be said for 'sentimentality', which I think in situations forensically and investigatively, is referred to as a 'gut' feeling
Good stuff Fernando!