With the raging inflation of the 1960s very much under control at this point, coin issuing resumed after a 10-year hiatus, and coins were issued on 1 January 1971, of denominations 1, 2 and 5 rupiah, all in aluminium.
10, 25, and 50 rupiah coins were added, in cupro-nickel, on 5 April 1971.
The coins featured on the obverse 'Bank Indonesia' a large '1'  with 'rupiah' underneath and the year '1970' (1, 2, and 5 rupiah) or '1971' (10, 25, 50 rupiah).

The reverse of the coins showed "Rp 1", "Rp 5", "Rp 10", "Rp 25", "Rp 50", plus various designs: white-browed fantail (1rp), rice and cotton stalk (2rp), black drongo bird (5rp), rice and cotton stalk with Indonesian wording "TINGKATKAN PRODUKSI SANDANG PANGAN" ("increase the product of clothing and food") (10rp), Victoria crowned pigeon (25rp), and greater bird of paradise (50rp).
The final mintages of these coins were: 136 million (1 rupiah), 139 million (2 rupiah), 448 million (5 rupiah), 286 million (10 rupiah), 1.22 billion (25 rupiah) and 1 billion (50 rupiah).

The 10 rupiah coin was issued as part of the UN Food and Agriculture Organization coins and medals program, an international issue by ultimately 114 countries.
A variety of coin sets were sold to coin collectors to raise money for the UN's food program.
In addition to the sale to collectors, the vast majority of the 10 rupiah coins were used within Indonesia - in addition to some rarer coins (none of which were issued in Indonesia) the FAO wanted low denomination circulating coinage that called for increasing food production.

At the time the exchange rate was 378 rupiah to the US$, so the smallest coin was worth approximately 1/4 of a US cent (note however that the 1 and 2 rupiah coins were never reissued, and hence the 5 rupiah coin was shortly to become the smallest denomination).

The coin selection was extended with a '1973'-dated cupro-nickel 100 rupiah coin of large size showing a Minangkabau tribal house, which was issued on 2 January 1974, at which time the coin was worth about US$0.24.
A total of 913 million of these coins were minted, some of which are still found in circulation today.

As a result of the successful re-establishment of coinage in Indonesia, notes below 100 rupiah were withdrawn in Indonesia permanently from 1 September 1975 (at which point the exchange rate was fixed at 415 rupiah to the dollar, hence the largest denomination banknote to be withdrawn, the 50 rupiah note, was worth around US$0.10).

1971 INDONESIAN COINS:
With the raging inflation of the 1960s very much under control at this point, coin issuing resumed after a 10-year hiatus, and coins were issued on 1 January 1971, of denominations 1, 2 and 5 rupiah, all in aluminium. 10, 25, and 50 rupiah coins were added, in cupro-nickel, on 5 April 1971. The coins featured on the obverse 'Bank Indonesia' a large '1'  with 'rupiah' underneath and the year '1970' (1, 2, and 5 rupiah) or '1971' (10, 25, 50 rupiah).
The reverse of the coins showed "Rp 1", "Rp 5", "Rp 10", "Rp 25", "Rp 50", plus various designs: white-browed fantail (1rp), rice and cotton stalk (2rp), black drongo bird (5rp), rice and cotton stalk with Indonesian wording "TINGKATKAN PRODUKSI SANDANG PANGAN" ("increase the product of clothing and food") (10rp), Victoria crowned pigeon (25rp), and greater bird of paradise (50rp). The final mintages of these coins were: 136 million (1 rupiah), 139 million (2 rupiah), 448 million (5 rupiah), 286 million (10 rupiah), 1.22 billion (25 rupiah) and 1 billion (50 rupiah).
The 10 rupiah coin was issued as part of the UN Food and Agriculture Organization coins and medals program, an international issue by ultimately 114 countries. A variety of coin sets were sold to coin collectors to raise money for the UN's food program. In addition to the sale to collectors, the vast majority of the 10 rupiah coins were used within Indonesia - in addition to some rarer coins (none of which were issued in Indonesia) the FAO wanted low denomination circulating coinage that called for increasing food production.
At the time the exchange rate was 378 rupiah to the US$, so the smallest coin was worth approximately 1/4 of a US cent (note however that the 1 and 2 rupiah coins were never reissued, and hence the 5 rupiah coin was shortly to become the smallest denomination).
The coin selection was extended with a '1973'-dated cupro-nickel 100 rupiah coin of large size showing a Minangkabau tribal house, which was issued on 2 January 1974, at which time the coin was worth about US$0.24. A total of 913 million of these coins were minted, some of which are still found in circulation today.
As a result of the successful re-establishment of coinage in Indonesia, notes below 100 rupiah were withdrawn in Indonesia permanently from 1 September 1975 (at which point the exchange rate was fixed at 415 rupiah to the dollar, hence the largest denomination banknote to be withdrawn, the 50 rupiah note, was worth around US$0.10).
1971 INDONESIAN COINS:
Coins of the rupiah