It would be good to see the 9 mm Browning Long box as well. Likely, it is a box that is commonly encountered in the United States, with a great deal of the ammunition having been imported into this country many years ago. One interesting aspect of those boxes is that the labels were originally Spanish-language, saying “50 cartruchos para pistola Browning, cal. 9 mm alargar, (9 mm Automático)” on four lines of print. This label was subsequently covered by a German-language over-label. Note that the original Spanish label is anonymous. The ammunition for the box I mention had a headstamp of four equidistant five-pointed stars, with no other entries.
This ammunition was probably an interrupted contract for for Colombia, as the timing would be right, as is the language. In 1937, Sweden sold some of the pistols to that country, for the district of Antioquia and those pistols are so marked. This was an usual exportation by Sweden because they were simply a license holder from Fabrique Nationale d’Armes de Guerre Herstal, Belgium, for the Husquvarna 1907 pistol, an exact, licensed copy of the Model 1903 FN-Browning handgun. It is, of course, possible that for some reason, FN was not prepared or did not want the Colombian order and passed it on to Sweden. Colombia never made the cartridge in question, so had to purchase it from somewhere else.
El Salvador and Paraguay are other possibilities for this ammo, as neither produced ammunition in c. 1927, when both purchased small quantities of the FN Browning Model 1903 9 mm Long-caliber pistol. It is remotely possible that Spain may have been the original country intended for the Spanish-label, but the if made in the Gustloff-Werke era at Hirtenberg, but it would have been late in that war, probably, and we have not heard of any use of this caliber in the Spanish Civil War, although it is certainly possible. The different calibers in use and different firearms used are staggering in their numbers.
Reference: “The 9mn/m Browning Long Cartridge, Part I,” Woodin Laboratory compiled by John L. Moss, IAA Journal 443, pages 4 - 18.
I hope this is of some help and interest. In the long run, I don’t think we have any postively confirmed information about this contract. The information above is basic solely on conjecture and the timelines and conditions of the era the ammunition was made in.
If for Colombia, as I suspect, the contract was evidently interrupted, as there is no evidence it was ever delivered to Colombia, of which we are aware. The over-label is in the German language, so the contract was probably not for Sweden. While never officially adopting the Model 1903 FN-Browning, Belgium did use some, as did the Netherlands. Pistols of both Belgian and Swedish manufacture marked with the intials “S.A.” Suomen Armeija - Finnish Army) indicate Finland used some, and it is know that Imperial Russia and Estonia had bought some, as did Serbia. All of these were very small purchases by any military standards. All of the European countries associated with use of this pistol, other than Sweden, were either invaded more or less successfuly by Germany during WWII, or were allied with them, in the case of Finland. It is not unlikely that the Colombian contract was blocked and the ammo relabeled and retianed for the use of Gross Deutschland, who must have captured some of these weapons, and perhaps some Le Française pistols of the same caliber, although France only produced 4,900 of those.