Avers et revers / Obverse and reverse

Bonjour,
J'aimerais avoir votre avis sur la définition de l'avers et du revers. En particulier, pour les deux pièces ci-dessous, quelles images sont des avers et lesquelles sont des revers selon vous ?
Merci.

                    

                    

Hello,
I would like to know you opinion about the definition of "obverse" and "reverse". For example, considering the two coins above, which images are obverse and which one are reverse according to you?
Thank you.

Le REVERS ne comporte t'il pas toujours la valeur faciale de la pièce ?

Par contre, il me semble qu'il y a inversion des descriptions sur les pièces ci dessous.

https://fr.numista.com/catalogue/pieces2490.html

https://fr.numista.com/catalogue/pieces1272.html

https://fr.numista.com/catalogue/pieces5780.html

https://fr.numista.com/catalogue/pieces2491.html

Quoted from http://en.wikipedia.org/wiki/Obverse:

"Generally, if in doubt, the side of a coin with the larger scale image will be called the obverse (especially if the image is a single head) and, if that does not serve to distinguish them, the side that is more typical of a wide range of coins from that location will be called the obverse."

".... the obverse side of a modern piece of currency is the one that evokes that reaction by invoking the strength of the state, and that side almost always depicts a symbol of the state, whether it be the monarch or otherwise."

".... [the secondary side] typically is used to reflect the country's culture or government, evoking some treasured aspect of the state's territory, its philosophy of governing, or the culture of its people. In any case, this secondary side usually is less focused, and probably always less central, than the obverse, to the facilitation of the acceptance of the currency."

Given this, I think the the left side image of both coins depicted in the original post are the obverse, as they bear the name of the nation of origin and the value of the coin.

interesting to read. I usually sort "obverse - image" to "reverse - nominal value", but that's not a
professional numismatic opinion. so we have to exhange reverse/obverse in this case?

Pour ma part  l'avers-obverse (appelée communément face) avec l'image principale et le revers-reverse (appelée cummunément pile) avec la valeur nominale, pourquoi compliquer ! et surtout avec les commémoratives où les artistes se défoulent !
donc pour les 2 pièces représentées par Xavier, le revers-reverse est à gauche-left et l'avers-obverse est à droite-right.
L'image principale est très clairement les skieurs sur la 1ère pièce et un objet d'art sur la seconde.

Je ne suis donc pas d'accord avec Cerulean qui dit (si j'ai bien compris) que l'avers-obverse sont les photos de gauche parce qu'elle mentionne la valeur et le nom du pays.

il est relativement courant de trouver le nom du pays sur le côté de la pièce qui a aussi la valeur
(Malaisie, Jordanie) et justement sur les pièces de Jordanie avec l'image du roi il n'y a pas de doute sur l'avers !

Pour la date on la trouve sur le côté revers ou sur le côté avers sans théorie particulière.

décidément les vis sont très partagés.  
Voici ce que dit la banque nationale du kazakhstan d'où viennent ces pièces :
http://www.nationalbank.kz/?docid=381
Pour eux l'avers est le pays émetteur et le revers le sujet.
Je suis allé voir plusieurs ateliers de monnaie comme Perth Mint et la Monnaie Royale du Canada et eux aussi indiquent l'avers pour l'autorité émettrice (portrait de la Reine) et le revers pour le sujet.
Y-a-t'il seulement une solution unique ou les pays font-ils différemment ?

Fact is: windsurf's examples show that there are lot of coins that are to be changed then.
lots of circulation coinage, too - to be precise - if we say "country's name gives the obverse, no matter
if nominal value is displayed on that side, too".
see croatia's coinage (see images).
I really don't know how to handle this. if we "open this box" there may be lots of complaints / wishes from
users who would like to have it for all other coins, too - this will give us a lot of work.
I really don't care - because I think it only matters if all data is correctly given. we could handle this for kazakhstan, only - if you insist. however we should think
about it  

For these kazakhstan coins I am absolutely sure :
Obverse is on the left and reverse on the right.
It's not me saying but National Bank of Kazakhstan.
I checked it on more than 20 countries (I have certificates to prove it) and each time the issuing authority is on obverse.  
I have commemorative coins only.

Cita: Makake77I really don't know how to handle this. if we "open this box" there may be lots of complaints / wishes from
users who would like to have it for all other coins, too - this will give us a lot of work.
I really don't care - because I think it only matters if all data is correctly given. we could handle this for kazakhstan, only - if you insist. however we should think
about it  

I agree with Makake77... I also think it not worth the pain... We should not start bothering with that.Otherweise it will be too much work, too confusing for too many people...   We can see that even mints don't give the same meaning to obverse/reverse !... So what can we do ? To make things easy maybe we can just call that side 1/side 2 ?...

At least we know which one is the edge !