25 Centavos

Guatemala's 1971 monetary reforms consolidated several smaller denominations and introduced nickel brass alloys across the mid-range fractional coinage, a shift driven largely by the rising cost of silver in the late 1960s. The Banco de Guatemala had abandoned silver in its smaller denominations years earlier, but the 1971 series formalized the transition across the board.

The six-year span of this type reflects stable production rather than any reissue or redesign event.