Okay, I'm sorry... A little enticement...
I'm having trouble to find the mint mark (sm) on this coin. Can someone point it out for me? https://en.numista.com/catalogue/pieces1674.html
Kind regards,
Chilian
Krause 20th century catalog mentions "sm" mint mark only on proof and silver coins of this denomination. Is your coin one of these?
If Krause is correct, probably Numista listing needs amendments.
I collect coins and tokens which circulated in Africa from 18th century to 2000. I sell about 7000 illustrated world coins from http://www.avscoins.com.
Andrey maybe correct here. I compared my silver and non silver versions and there is a small mark above and left of "SINGAPORE" on the silver version. It looks like a monogram that could be "SM."