help id tin coin, think from Indonesia

Tin cast

wt 67 g

dia 17.98

 I thought Palembang but can not find.Thank you very much daryl

67 grams? 

I think you're right but I can't find a match either.

Maybe one of the dozens of subtypes of type 11?  http://www.fsrcoin.com/palembang.html

I reweigh it my scale 67 g.  

thickness 67mm

find that to be odd