I wonder the information about the headstamp ，it might be the name of the factory and when it be produced？I need help about the headstamp.
This is something Russian, Serbian or Bulgarian. Measurements may help.
This is a Russian 10.67x57R (4.2-line rifle cartridge).
Made in 1890 by I think St. Petersburg Arsenal.
FR is the metal supplier and could be France.
Thanks a lot!
Yes, this case is Russian. The headstamp is:
9 + 0 - case was made at St-Petersburg ammo plant in 1890
ФР (FR) - the code of the brass supplier: Общество Франко-русских заводов, бывший Берда (Society of French-Russian plants, former Berd plant), St-Petersburg.
I - the first part of the year (december-march)