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"WRA 61 (Circle with cross inside)762 04 CBC"
I have to assume that you have 2 headstamps on one line in the above example, but I'm not exactly sure where to parse it.
WRA 61 is Winchester Repeating Arms, 1961. The circle/cross is the NATO acceptance stamp, meaning that it's loaded to NATO spec for that caliber.
CBC is the mark for Companhia Brasiliera de Cartuchos (Brazilian Cartridge Company)
"WRA 30 06 SPRG"
Winchester Repeating Arms, .30-06 is the caliber (US military round from 1906 to circa 1954), SPRG means Springfield, after the old government arsenal where the .30-06 and the first rifles that fired it were developed.
"TZ 84"
TZ is, I believe, a marking used by Isralie Military Industries, the 84 would be 1984. I've only ever seen it on pistol cases.
"R.P. 308 WIN"
Remington Peters, an American manufacturer. .308 Win. is the .308 Winchester, the civilian designation of the 7.62x51 military round adopted by the United States and used from about 1954 through the mid 1960s in rifles, and until fairly recently in machine guns.
"WRA 61 (Circle with cross inside)"
See above.
Not at all sure how you could determine exactly where the specific cartridges came from. All are common markings, and quantities are probably in the hundreds of millions of rounds loaded using the same general headstamping practices. Distribution is literally worldwide.
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