This is a 1975 Fiji gold King Cakobau coin with a denomination of 100 dollars. It is uncirculated and has a fineness of 0.5, with an AGW (actual gold weight) of .5032 ozt.  On the obverse it features Queen Elizabeth II and the reverse features King Cakobau.  It has been certified by NGC with a grade of PF 69 ULTRA CAMEO and a certification number of 6894001-003, this is also a top pop being only 1 of 3 coins of this type to have this grade by NGC with none being graded higher, and this coin has a very low mintage of only 3,197 pieces. The KM number is KM# 38.