Don't get caught with this in Myanmar!  Punishable by death.  Issued by the rebel Patriotic Liberation Army in the jungles of Burma.  They lost.  Most of these were subsequently smashed up into gold that could be carried around without the death penalty
 
4 grams of .999 gold
 
Obverse
Myanmark Peacock
Lettering:
ပြည်ထောင်စု အစိုးရ
4gr 4gr
၁၉၇၀-၁၉၇၁
Translation:
Union of Burma Government
1970-1971
 
PCGS cert # 49777213