these are the 4 Days Productions just before step into the new facilities, could be the lowest mintage in the year 2009, this is instantly very shoutafter by every collectors, This coin comes Flat with printed cardboard, coin capsulated with,  you have foldedup  to make boxed building newly constructed in the RAM Campus let see what the Royal Australia Mint says about it  as follows

"2009 Master Mintmark $1 Al/Bronze Uncirculated Coin

In 2009 the Royal Australian Mint completes one of the most substantial upgrades to its facilities since the original construction in 1965.

To mark this occasion, the Mint will be releasing a Master Mintmark on a standard uncirculated $1 coin. The mark featuring the letter ‘C’ with Kangaroo passing through it was chosen by the Mint’s CEO Janine Murphy from a selection of motifs produced by Mint design staff.

The Master Mintmark logo has been registered with IP Australia and will appear on a variety of Mint numismatic products in the future.

The blister-packed coin is presented in die-cut packaging that folds into a miniature Mint building, intriguing for the young collector and those wanting an important keepsake from our ongoing numismatic history.

Denomination	$1
Metal	Al/Bronze
Mass	9.00grams
Diameter	25.00mm
Finish	Uncirculated
Mintage	Unlimited