1.5 oz Australian Platypus Silver Coin

Perth Mint's Piedfort Platypus in the Next Generation Series

The 1.5 oz Perth Mint Australian Platypus Silver Coin is the 2021 release in Perth Mint's Next Generation series, a programme running since 2018 that features a different Australian mother-and-baby animal pair each year. The Platypus coin depicts a mother platypus swimming underwater with her newborn beside her, searching for food along the bottom. It is struck in piedfort style, meaning it uses the same 40.90 mm diameter as a standard 1 oz Perth Mint coin but with double the thickness to accommodate the additional silver.

The piedfort format originated in medieval France, where double-thickness coins were struck as presentation pieces. Perth Mint revived the concept for modern bullion, creating coins with a distinctly chunky feel at 6.02 mm thick. The coin contains .999 fine silver, meeting the investment-grade standard used by the majority of world mints. Australian legal tender status under the Australian Currency Act provides sovereign backing from a government-owned mint that has operated continuously since 1899.

With a mintage of 75,000 for the silver version, the Australian Platypus sits between mass-market bullion (Perth Mint Kangaroo at 300,000+) and true collector pieces. The Next Generation series has run continuously since 2018, with the Koala, Crocodile, Kookaburra, Platypus, Dingo, Kangaroo, and Emu representing successive years. Each release is a standalone coin rather than part of a subscription programme, so collectors can enter at any point.

Next Generation Platypus Technical Details

Perth Mint's standard security features apply to this coin: micro-laser engraved text inscriptions on the reverse contain an authentication letter visible only under magnification, and radial lines across both faces provide additional anti-counterfeiting protection. The Perth Mint 'P' mintmark appears on the reverse, confirming the coin's origin from the Western Australian facility. These security measures are shared across all modern Perth Mint bullion, making them familiar to dealers and authentication services worldwide.

The piedfort format means this coin has the same diameter as a standard Perth Mint 1 oz coin (such as the Kangaroo or Kookaburra) but roughly double the thickness. This makes it compatible with the same diameter capsules used for standard Perth Mint coins, though the extra thickness means it will not fit standard 1 oz coin tubes designed for thinner pieces. The visual effect is a noticeably chunkier, more substantial coin that is immediately distinguishable from standard-weight bullion by feel alone. The 10 oz version of this coin (mintage 2,500) exists as a significantly rarer variant commanding higher secondary market premiums.

From Koala to Emu: The Next Generation Programme

Perth Mint launched the Next Generation series in 2018 with the Koala, establishing the mother-and-baby theme that would define the programme. Each year introduces a different Australian native animal in a nurturing pose, creating a thematic unity rare in bullion programmes. The chronology runs: Koala (2018), Crocodile (2019), Kookaburra (2020), Platypus (2021), Dingo (2022), Kangaroo (2023), and Emu (2024).

The Platypus is a particularly apt subject for an Australian coin. One of only five extant species of monotremes (egg-laying mammals), the platypus is endemic to eastern Australia and Tasmania. Males carry a venomous spur on their hind legs, making it one of the few venomous mammals. The animal's improbable appearance, combining a duck-like bill, beaver-like tail, and otter-like feet, famously led early European naturalists to suspect taxidermy fraud when the first specimen reached London in 1799.

Reverse designer Monique Reeves captured the underwater world of the platypus, depicting the mother and baby pair swimming together with bubbles rising around them. The composition emphasises the animal's aquatic grace rather than the more commonly depicted bank-dwelling pose. The obverse carries Jody Clark's sixth-generation effigy of Queen Elizabeth II, used on Australian coins from 2019 to 2022 before the transition to King Charles III.

The Next Generation theme of parental bonds is unique among world bullion coin series. No other major mint has built an entire programme around this concept, making the series collectively distinctive even as individual releases compete with more established Perth Mint lines like the Kookaburra (running since 1990) and Koala (since 2007).

Platypus vs Other Perth Mint Wildlife Options

The Perth Mint produces a deep range of silver wildlife coins, and the Next Generation Platypus competes primarily with other Perth Mint products for collector and stacker attention.

Against the Silver Kookaburra and Silver Koala, the Platypus offers the piedfort format as its main distinction. The Kookaburra and Koala are standard 1 oz coins with longer histories and larger collector bases, but they lack the tactile heft of the doubled-thickness piedfort. The Kookaburra has run since 1990 and the Koala since 2007, giving them deeper secondary markets and more predictable liquidity.

Compared to the 1oz Silver Maple Leaf, the Platypus offers annual design variety and the piedfort novelty, but at a higher premium per ounce and with lower liquidity. The Maple Leaf is the default choice for pure silver accumulation at minimal premium; the Platypus appeals to buyers who value the collectible dimension alongside the metal content.

The 75,000 mintage is moderate. For context, the RCM Wildlife series (2011-2013) had 1,000,000 per design, and standard Perth Mint Kangaroos often exceed 300,000. The limited run gives the Platypus collector potential but reduces secondary market depth compared to open-mintage alternatives. Among Perth Mint's own wildlife sub-series, the Emu (30,000 mintage) is even more constrained, while the Wedge-Tailed Eagle series has varied mintages across its decade of production.