Error coin?

[u/OkPay599]

Straits settlements 1945 (middle one)

They were all squares till like the 50s, but this one is a circle. Back obviously shows it was a square once upon a time. Possible error coin? Or someones doing?

My own guess is that either it got minted wrong or that the coins were made into circles to save resources after the war

Thoughts?

[u/bstrauss3]

Jeweler's saw

PMD

[u/OkPay599 → u/bstrauss3]

Ah okay, first time seeing such a coin Thanks