Macau 3 Coin Gold Set
According to the Royal Mint Certificate which accompanies this coin:

Chinese mythology tells of a day when Buddah summoned all animals to a meeting and promised that any of them whom paid him homage would be honoured by having a year named after them. Only 12 animals arrived at the meeting place and so each year of the twelve year cycle of the Chinese calender was named after an animal in the order they arrived at the meeting with Buddha. The rat, tiger, rabbit, dragon, snake, horse, sheep, monkey, cockerel, dog and pig.

Technical Specifications

Denomination	Diameter	Weight	Fineness	Gold Content
1000 Patacas	28.4	15.98	.916	0.4708
500 Patacas	20.5	7.99	.916	0.2354
250 Patacas	19.3	3.99	.916	0.1177
Set of 3		27.96	.916	0.8239

Prices & Availability
Macau Proof Gold Sets
The prices quoted in the US $ column may be out of date due to currency fluctuations.

Date	Description	Mintage	AGW	Availability	Price £	Price $
1996	Year of the Rat, Proof in Red Leatherette Case, 3 Coins, 1000 Patacas, 500 Patacas, 250 Patacas	2,500	0.916	Yes	£875	$Ask

Notes
AGW = Actual gold content weight in troy ounces.