I have a small collection of a coins of Sarawak. It was the principality in Malaysia since 1841 until July 1 1946 when Sarawak became the British colony. James Brook was the first Rajah of Sarawak at 1841-1868. His nephew Charles Jonson Brook was the second Rajah of Sarawak at 1868-1917. And his son Charles Vyner Brook was the last Rajah of Sarawak at 1917-1946. The monetary system of Sarawak was simple: 1 dollar = 100 cents. All of a coins of Sarawak was made in Heaton Mint (Birmingham, UK).
10 cents 1934, copper-nickel, weight - 5,8 g., size - 26 mm, thickness - 1,6 mm, mintage - 2000000 pcs.
THE 1 CENTS COINS TYPES ARE LISTED HERE : http://giladzuckerman.webs.com/mercuguinness.html#MALAYSIA , YOUR 10 CENTS COIN IS THE ONLY ONE I KNOW OF THAT TYPE THAT SOMEBODY HAS IT.