1966 (L) Australian 20 Cent Coin, featuring the WAVY BASELINE or WAVY 2. Graded AU53 by PCGS Certificate #. One of the first Australian Decimal Currency errors (if not the first), a desirable, and very sought after addition to every coin collectors collection since its discovery. Read more on this coin here (with thanks to the Australian Coin Collecting Blog). The item "1966 (L) Australian Twenty Cent GRADED AU53 PCGS WAVY BASELINE/WAVY 2 RARE" is in sale since Tuesday, December 3, 2019.This item is in the category "Coins\Coins\Australian\Decimal". The seller is "loosechangecoins" and is located in Redbank, QLD. This item can be shipped worldwide.