[Reventlov]

Originally Posted by Jim McDougall

These letter groupings are acrostics, well known to have been used in these Brescian regions of Italy on their blades in 16th-17th c. They are often first letters of phrases, mottos, or invocations however in these repeated letter forms may have other arcane significance.
As noted, CAINO was one of the key proponents of this fashion.

Originally Posted by Jim McDougall

Sir James Mann (Wallace Coll. 1962, various entries) describes numerous rapiers, all with CAINO blades, various marks and typically dated c.1610 (one as early as 1580) on Flemish, German hilts, one on a Spanish cuphilt c. 1625.
The letter combinations are the same sequencing, using various letters, often reversed on the opposing blade face.
i.e. RSNRSNRSND , one side SRNSRNSRND other. The same three letters repeated three times then with a separate terminating letter.

Thanks Jim for reminding me of these! Do you know if anyone has attempted to decipher any of these acrostics? The RSN/SRN sequence has commonalities with much older medieval inscriptions, can't help but wonder if this is more than coincidence...