Dive into the vibrant world of philately with the complete set of seven First Day Covers from Australia, themed around 'Nature's Flying Colors' and postmarked in 1978. Each cover showcases a delightful array of multi-colored flora and fauna, capturing the essence of Australia's rich natural heritage. These ungraded and uncertified collectibles are a testament to the era's postal artistry, featuring the .20 denomination and decimal currency. They remain handstamped with the First Day of Issue cancellation, preserving their authenticity and making them a noteworthy addition to any collection.