Theme : Zodiac signs 23 g

All zodiac stamps issued by Hong Kong postal services, between 2012 and 2023 are issued in the same style and can be considered as one complete set.
The 4 lower values, the $10 souvenir sheet and the silk paper $50 sheet each year, make a complete set of 48 stamps, 12 souvenir sheets and 12 silk miniature sheets.

And yet ... that was not enough.
After the first 4 years (2015), the second 4 years (2019) and the last 4 years (2023), from each set, one stamp was repeated in a block of 4. This time, with gold and silver prints. 

In 2015, 4 additional stamps were issued, Dragon, Snake, Horse and Ram. 
Each stamp with a face value of $10, depicting one stamp out of the lower values issued each year.
Each animal is overprinted with gold/silver foil.

Hong Kong 2015 - 4 zodiac signs

4 years later, in 2019, a second block of 4 stamps was added, now depicting one of each stamps issued between 2016 and 2019 : Monkey, Rooster, Dog and Pig.
Again, each stamp with a face value of $10, and gold/silver foil overprints.

Hong Kong 2019 - 4 additional zodiac signs

In 2023, when the set was completed, another special block of 4 was added, with the remaining 4 signs: Rat, Ox, Tiger and Rabbit.
Similar to the other stamps, the face value is $10 each and the designs are signs from the previous 4 years, but with gold/silver foil overprint.

2023 Hong Kong final 4 zodiac signs

A special thank to my friend-collector Eric, from Hong Kong, who helped me completing this great set. 

to be continued...