This one figures in page 28 of R.D.C. Evans work "THE PLUG BAYONET".
Mounted in a hilt with a cross guard with 'Helmet-Head' finials (a XVII century fashion) we can see a perforated blade measuring 356 m/m, (quote Evans) possibly a re-used section of a rapier blade.
Pity he doesn't attribute a date to the blade ... for the sake of this discussion, i mean
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