The Antikythera Mechanism is the oldest , surviving , gear machine and is considered the first known analoly computer of manking . 

It was constructed 2200 years ago and is used to accuratery calculate the position of the Sun , the Moon and possible some large planets .

The mecanism was recovered by fishermen in a shipwreck oo the Greed island of Antikythera .

Cardholder Antikythera Mechanism goldplated 24K brass on acrylic base  . An artwork, created for your home or office decoration.