These inscriptions do indeed fall into the topic of this thread, and thank you so much for continuing to contribute here as the material you are sharing is not often seen in the standard references.
The inscriptions on blades, while not necessarily trademarks, are often found on blades that end up mounted in ethnographic weapons. The 'Spanish motto' (Draw me not without reason etc.) is one that appears widely, and as you pointed out earlier in the thread, is definitely earlier than the 18th century as I had originally thought. I would like to address that motto later in the thread. This appears on the 'Spanish' blades now known to have been produced in Solingen, and are found throughout the Spanish colonies.
Another key example is of course 'Andrea Ferara'......it is typically held that there was indeed such a maker, allegedly in Belluno. But is this appellation actually a name....or a term? such as Andrew (=true), ferara (=iron). It is interesting to note an instance of a Spanish rapier that carried the inscription four times over the blade.....perhaps to multiply the potency?
It seems that these interesting phrases/mottos do occur in duplication, but some such as this only in limited number. It seems to imply the same maker or shop, but may simply be copied by another. I know that often German makers had workers limited in literary skills and inscriptions, which accounts for the often unusual and transliterated versions of spellings and wording.
Thank you again Fernando! Your help and interest is very much appreciated and we will continue to investigate more on these and many other marks, inscriptions and any anomalies that seem consistant on trade blades.
All very best regards,