Walking srick ( Cane) guns were common in the late 19th Century, not only in Europe, but is European settlements through out the world. Calibres Varied from 7mm (probably the most common) through to 12mm, and the Sevens had a whole range of Long cases to take either Ball or Shot. The majority of Ammo makers carried at least one “Cane” cartridge, and the French seemed to make more than most. Known examples that are identifiable are GG ( Gaupillat);
Rimfire versions were also made.
Being a South American find, I would say they were supplied to a local BA Gunshop or Cane Maker, and loaded locally to suit local conditions (or the preferences of the client). The “step” in the head may have been to fit a proprietary design of Cane gun breech, and to prevent the use of other cartridges , which may have damaged the Cane-gun, and the User’s hand…Or vice-versa, to prevent the use of these cases in “Other Guns”.
Unless someone comes up with an original Package, or Catalogiue references (either French or Spanish/Argentinian,) we may never know which cane-gun they were meant for, and who made them.
Nice one, from an Epoque when citizens defended themselves legally from Ne’er-do-wells, with un-obtrusive and reasonable effective means. ( the other “quiet persuader” was the sword-stick, from an even earlier era.)
Has AACAM published any history of the Gunsmiths/gun dealers of Buenos Aires, at all? it would make interesting reading, what with Spanish. German, French, Italian and probably English names in the mix…?