The manufacturer of these Blanks has obviously used once-fired cases, as the cases are “crimped” and sealed with “blue lacquer”. Also, there is a mixture of Boxer primed ( US headstamps) and Berdan headstamps ( FN, IM,)
The US has, up till the 1990s, never “crimped” its M1909 type .30 cal blanks (they were wadded only and lacquered Red).
The language of the Box is Spanish, so I would suspect a Central or Southern American origin for the Blanks.
Maybe an examination of further of the case headstamps will give an idea of Which country made the Blanks…because aside from the US origin cases, there are some “native” cases present ( “IM” ), as well as the ubiquitous “FN”, which everybody in Latin America used at one time or other.
BTW, IM is “Industrias Militares” in Spanish, and could relate to several Latin countries.
I would say they are of late manufacture…1980s to 1990s, and so the primers would be NON-Corrosive irrespective of the headstamp.
BTW, US-made M1909 Blank Cases loaded by Lake City (but with Mixed headstamps from the 40s to the late 60s) and “filled” in the late 1960s, were Non-corrosive. WE have thousands of them, from several Movies, which were originally sourced in Jordan and the UK, which LC had assembled in the early 1960s, for “Foreign Aid” using up cases either “recovered” from Ball ammo, or Reloaded using fired Ball cases.
ONly a close examination of the cartridge cases of the Blanks as they are now may give some indication as to their origin.
If they are M1909 Blanks with the Crimp added and re-varnished, they may be part of the 1960s LC production…in that case, there should be the remains of the Circular wad Cannellure in the neck, visible at the end of the star crimp folds…Also, the Primer Pocket crimp is less evident on "reloaded "Ball cases.’ AS Vince Green noted, in either case, Corrosive or Non-corrosive), cleaning the rifles with a Water based cleaner, followed by normal cleaning ( or the British “Hot water in Bore” method) will prevent any rusting effects due to any corrosive salts.
Interesting cartridges and as yet un-identified provenance.
AV Ballistics Film Ordnance Services
BTW, the latest .30/06 Blanks being supplied by the US Army for Veterans funeral salutes are made by CBC (Magtech) of Brazil…New cases, star crimped mouth. ( 2008 manufacture, I think).