Issued to mark the 2002 Commonwealth Games held in Manchester, this was one of the first tri-metallic coins produced by the Royal Australian Mint, bonding a gold core with concentric silver and copper rings in a single struck piece. The technical challenge of joining three dissimilar metals without separation under press pressure required significant tooling development. The copper outer ring is prone to minor galvanic interaction with the silver middle over time, a known storage concern for long-term holders.
Issued to mark the 2002 Commonwealth Games held in Manchester, this was one of the first tri-metallic coins produced by the Royal Australian Mint, bonding a gold core with concentric silver and copper rings in a single struck piece. The technical challenge of joining three dissimilar metals without separation under press pressure required significant tooling development. The copper outer ring is prone to minor galvanic interaction with the silver middle over time, a known storage concern for long-term holders.