Anyway,
just for general knowledge guys,
the symbol engraved at the back is national symbol of indonesia.
it called Garuda Pancasila. (some kind of mythical bird)
and the sentence "Bhinneka tunggal ika" means Unity in Diversity
this was quoted from 14th century from a poem by Mpu Tantular
and if you see the details,
the feather on each wing are 17,
the feather on the tail are 8
19 feathers below the shield (near the tail)
45 feathers on the neck
this represent the independence day of indonesia
17th august 1945