Patent Hartmann .22 RF (sub caliber training)


Hello from Argentina, what type of cartridge is ?
the inscriptions say :

"Schuchardt Sch


The only thing I could find about a Hartmann patent is in Barry Gracia’s book “The .22” Rimfire Cartridge, A headstamp & Identification Guide," page 23 (the book was published by the author in New Zealand): “Hartmann Zielmunition has a case about mid-way between Short and Long Rifle loaded with a heavy lead bullet o the length of a regular Long Rifle Cartridge. They were for use with military Mauser sub-caliber training device of German origin. (HZ in circles)”

This description would correspond to the picture of the steel adaptor cartridge shown on the website referenced in your question.