Caisson Francais a identifier

Une question de Ralph Lovett, qui possede une superbe collection de canons de la premiere guerre mondiale, aux USA (http://www.lovettartillery.com/):

"I have attached a few photos of a Limber box that maybe for a French field gun. It seems possible for it to go with the 80mm mle/1877. What are your thoughts on this one?"

En Francais : quelle est l'identite du caisson Francais presente sur les photos jointes ? Cela pourrait-il etre un caisson de 80mm Mle 1877 ?