Nice bit of info. Yeah, the round could have been developed between 1900 & 1910 and may have paralled the GrŘndig version?

I finally found what I was searching for: AR. ANO Bte are the letters, or something of the sort, and may have been common on early Auguste Francottes. I can't tell if the controller's stamps are crowned or spangled. But Johann Springer was sourcing Auguste Francotte for weapons, weapons in the white or parts kits/tube sets. Then Franz Denk was sourcing Johann Springer. The following is similar and touts the k.u.k appointment( - ) so it would have been made during or after 1872.

Kind Regards,