for all non-eurocoins:
http://users.skynet.be/bart.vandensteen/numismatiek/posities.html
http://www.shop.filatis2.com/nl/coins_info.html
http://www.shop.filatis2.com/en/coins_info.html :
2 eurocoins, courante coins and commemoratives have a text or image on the edges. Mostly there are 2 versions, we call these Position A and Position B.
If there is a text on the edges:
Position A = Put the face value up (2 euro and map). If you can read the text it's Positie A.
Positie B = Put the face value up (2 euro and map). If the text is upside down it's Position B.
For coins with stars and number 2 (changing up and down) 2 ♠ ♠ 2 ♥ ♥ 2 ♠ ♠ :
Positie A = Put the face value up (2 euro and map). Pick a readable 2 and look at the start next to it on the right side. If the star has one pointy top, it's position A.
Positie B = Put the face value up (2 euro and map). Pick a readable 2 and look at the start next to it on the right side. If the star has two pointy tops, it's position B.
Portugal is different. You have small castles on the edges
Positie A = Put the face value up (2 euro and map). If the top of the towers point to the right, it's position A.
Positie B = Put the face value up (2 euro and map). If the top of the towers point to the left, it's position B.
This way there is a postion A or B with most of the 2 eurocoins. Some countries don't make a differens, like Malte, Estonia.