Help id .32 S&W Long headstamp

Today I got some .32 S&W Long cases with“o 19” headstamp.Does anybody have any informations about this?

Magnum, what is the exact case length?

I assume this one was made in China?
The brass color appears like.

Did you compare the font of the “19” to known Chinese headstamps to see which manufacturer might be it?

Same point with me,but I still didn’t find any Chinese manufacturer uses this kind font of the number“1”.
The exact case length is 23.16mm

Still very interesting!