Hi everyone,
I wanted to share a two-part historical and engineering study I've written about a unique 1966 Australian 20-cent piece I pulled from circulation.
Rather than a pristine variety, this coin captures the violent, messy final moments of a die as it literally fractured and disintegrated on the press under tons of hydraulic pressure.
Because formatting the microscopic forensic photos alongside the text is incredibly detailed, I have compiled Part 1 into a clean, easy-to-read PDF document attached below.
I would love to hear your thoughts on the structural die failure theory! Part 2 will be posted next week.