The Story

Thermometer 2018 Tuvalu 2 oz Silver Coin $2 NGC PF70 Antiqued First Releases

This beautiful Thermometer coin follows the 2018 Compass release that previously sold out at the mint. From Perth Mint, this coin offers an operational dial Thermometer with an antiqued finish and Aztec-style sun in the middle.

Essential for meteorology, medicine, industry and scientific research, thermometers are not the result of a single invention but an evolution spanning about 2,000 years. While thermometers’ exact origins are unknown, several historians have credited the first instrument for measuring temperature to Hero of Alexandria, who lived circa 10-70 AD in Egypt. A people who worshiped gods affecting temperature were the Aztecs, whose civilization flourished in central Mexico before the Spanish conquest.

  • NGC certified PF70 Antiqued First Releases
  • Contains 2 oz of .9999 fine Silver.
  • Each coin is presented with a classic black display case, within a stylized shipper, and is accompanied by a certificate of authenticity.
  • Obverse: Reveals the thermometer’s sensor which is encircled by Aztec-style patterning, the Ian Rank-Broadley effigy of Her Majesty Queen Elizabeth II, monetary denomination and the 2018 year-date.
  • Reverse: Featuring an antiqued finish, the coin is inset with an operational dial thermometer including both Celsius and Fahrenheit scales. The thermometer’s face portrays an Aztec-style sun in the middle. The thermometer is surrounded by Aztec-style patterns and iconography based on the circular Aztec agricultural, or solar, calendar. The fire-breathing sun god Tonatiuh is represented at the top holding an arrow in one hand, a flaming torch the other and wearing flame earrings. At the bottom is Itztlacoliuhqui, the god of frost and cold, breathing frost and carrying an arrow. On the left, or cold side of the thermometer dial is an Aztec, or Mesoamerican, stylisation of a snowflake. Opposite is a similarly styled depiction of the sun’s rays. The reverse also incorporates The Perth Mint’s traditional "P" mintmark.

Authentication & Rarity

What Makes This Piece Special

Every metric below has been independently verified. This is not a generic collectible — it is a documented specimen with provenance.

Year 2018
Denomination $2
Country/Region of Origin Tuvalu
Composition Silver
Metal Content 2 oz
Finish Antiqued
Releases Designations First Releases
Grade Rating 70
Grading Provided By NGC
Mintage 2500
Mintage Tier 1,001–5,000
NGC Population 49 at PF 70 ANTIQUED, none finer (NGC, June 2026)
Mint The Perth Mint
Finest Known Yes
Pop At Grade 49
Item Category Collectibles & Fine Art
Item Subcategory Coins
Item Type Collectible Coins
Circulated / Uncirculated Uncirculated
Purity .9999
Series Inventions
Strike Proof
NGC Grade PF 70 Antiqued
Theme Curiosities & Icons

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