Iran

Iranian Ammunition Factory

At the 9 & 3 O'clock position, the caliber (M1) is mentioned.

Date is at 6 O'clock position based on the Farsi calendar. This year starts at March 21st of the Gregorian calendar and you have to add 621 or 622 to get to the Gregorian year.

Iran numerals

Year at 6 O'clock: 45 = 1966

Year at 6 O'clock: 46 = 1967