I doubt very much, that anyone with knowledge of typefaces would try a guess, and if someone did, the answer would be very vague, and therefore of little or no use. Maybe, if the letters were regarded as a logo, a result can be reached, but this would mean books with European factory stamps – anyone volunteer?
Ian, on the top picture where you show the two stamps, it seems as if the edge is ‘hollow’. Is it, or does it only look so to me? If it is, this could be of some help too, if we bring in the forum specialists on European blades.
Nice Firangi - when you get it cleaned
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Jens