Indonesian 1, 5, 10, 25 and 50 Sen issued in 1964

Hi,

A question to experts in financial and/or political history from a lay man that I am about the Indonesian Sen notes that were issued in 1964 pick numbers  #90, #91, #92, #93, and #94. They stand out by their utter simplicity and portraying a civilian. I read they were issued during high inflation. But why their simplicity and why the militant look of the portrait on four of them shown on numista here?

Regards,

Benedict

Hello 🤖

Without pictures, it will be very difficult for anyone to help you. Could you please post clear pictures of each side of your item?

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According to my 2005 Indonesia banknotes catalogue, this series was referred to as 1964 Volunteers series.