Unknown Cartridge Marking

[old gun]

Can anyone tell me what "FMMAP" stands for on a cartridge I believe to be for a Model 91 Mauser 7.65x53 Mauser? It is also marked "19" on one side of the cartridge and "47" on the other, which I take to be the date of production.It also shows a "SF" on the bottom of the rim. Would there be any way to determine if the primers are corrosive?

Thanks in advance to anyone who can provide information.
old gun

 

[tlen]

http://cartridgecollectors.org/headstampcodes.htm
FMMAP SF = Fábrica Militar de Munición de Armes Portátiles San Francisco, San Francisco, Argentina. 19 47 = Year of manufacture
I'd suspect most likely the primers are corrosive as was most military ammo was at that time period. Not really a problem, just use hot soapy water during cleaning.