The 1977 Singapore 10 dollar coin is a non-circulating commemorative issue catalogued as KM# 15. This particular coin was minted to mark the 10th Anniversary of the Currency Interchangeability Agreement between Singapore and Brunei. The agreement, established in 1967, allows the currencies of both nations to be used at par in the other country. The 1977 issue had a total mintage of 500,000 pieces, all produced by the Singapore Mint.
The physical specifications of the coin are consistent with a large commemorative piece. It is composed of a copper-nickel alloy and has a substantial weight of 30.6 grams, a diameter of 40.7 millimeters, and a thickness of 3 millimeters. The coin features a reeded edge. Its design directly reflects the event it celebrates. The obverse depicts a container ship, a symbol of commerce and trade, surrounded by the inscription "SINGAPORE" and the year "1977".
The reverse side of the coin provides more explicit details about its purpose. At its center is the denomination "$10", which is flanked by the Coat of Arms of Singapore on the left and the Coat of Arms of Brunei on the right. An inscription around the coin's perimeter reads "CURRENCY INTERCHANGEABILITY AGREEMENT 1967-1977" and "SINGAPORE-BRUNEI", clearly stating the nature of the commemoration. Numismatically, the value of this coin varies with its condition, with uncirculated examples in grades such as MS 63 and MS 65 typically valued in the range of $18 to $30.
