108. Australia Coins Part 1: Australian 50c 1991 25th Anniversary of Decimal Currency

image 1: obverse and reverse of the coin

Country of Origin: Australia

Date: 1991 

Denomination: 50 Cents

Shape: Dodecagon
Orientation: Coin Allignment

Weight: 15.55g

Diameter: 31.5mm

Thickness: -

Composition: Copper-Nickel

Population: 4,704,000 pieces

Reference: 

Mint: Royal Australian Mint

Category: Commemorative Circulation Coin

Demonetized: No

Engraver/Designer: Raphael David Maklouf (obverse) and George Edward Kruger Gray (reverse)

Designer's Intial: Yes, "RDM" on the neck of the Queen on obverse
Variety: -

Obverse: Diademed bust of Elizabeth II right, around, ELIZABETH II AUSTRALIA 1991

Reverse: At centre, Ram's head, around below, FIFTY CENTS; around above, 25TH. ANNIVERSARY OF DECIMAL CURRENCY

Edge: Plain

        I always seek to gain more knowledge, directly or indirectly by indulging in this collecting coins and banknotes hobby. What kind of knowledge you can get? In this case, do you know what do people call a shape with twelve sides? It's dodecagon!