The Bright Ideas Privy Mark Collection: Seven Coins, One Lightbulb, 15,000 Sets

Every Bright Ideas product tells the same story of Australian invention. The $1 and $2 Privy Mark Seven-Coin Collection tells it in the most complete way.

At $159, it is the premium set in the program.

What makes it different

Each of the seven coins carries a small lightbulb privy mark. A privy mark is a tiny symbol added to a coin's design. It sets these coins apart from the standard releases. Collectors often look for privy marks because they are produced in smaller numbers.

The coins sit in a keepsake box with seven card slots. Each coin has its own card. The box is designed to be displayed, not stored in a drawer.

What is inside

• Five $1 coins, one for each invention, with the lightbulb privy mark.
• The $2 till coin on a card.
• A colour version of the black box flight recorder coin, on a card.

That colour coin is guaranteed in this set. In the $1 folder set, it appears in only 1 in 10.

The five inventions

• The stump jump plough, patented by Richard Smith in 1876.
• The black box flight recorder, invented by Dr David Warren in 1953.
• The jaffle maker, first created by Dr Ernest Smithers in 1949 and reimagined by Breville in 1974.
• The Safe-n-Sound Baby Safety Capsule, from Bill Bowtell, Bob Heath and Colin Nagel.
• High-speed WLAN technology, developed by CSIRO in the 1990s.

The numbers

• Metal: aluminium bronze
• Denominations: $1 and $2
• Coins: seven
• Maximum mintage: 15,000
• Price: $159
• Limit: 10 per customer, address or household

Who it suits

This collection suits collectors who want the full program in one presentation. It also works as a significant gift. A milestone birthday, a retirement or a thank you to someone who works in science, aviation or farming are all good fits.

Pair it with the $2 proof coin for a complete Bright Ideas display.

Buying from Mint Coin Shop

Mint Coin Shop is an official Royal Australian Mint stockist and sells at the recommended retail price. There are no ballots. Fair purchase limits help more collectors get a set. Orders are checked by hand, and the pick and pack process is filmed for security.