Hi David,
Thank you for that reference which it seems I have seen as well ( I think it may be in Pant.....Jens? help
I think the biggest problem with the blade on this is not as much the serration as the extremely counterproductive curvature of the blade.
Also, it seems unclear on the semantics of 'armour', which if mail or steel would be ridiculous to expect being cut by a blade. If the 'armour' was of the heavy textile type, more plausible maybe.
All the best,
Jim