I can't see much from a back view.
They could be Wheaten Marans, but poorly colored. The legs should be white/pink not blue/grey. Or were you expecting leg feathering?
French style Marans have leg feathers down the outside of the leg all the way down the outside toe.
American style Marans have no leg feathers.
So if the concern was leg feathering, then these would be American style.
However the leg color is off for Wheaten Marans. The other colors of Marans do have a grey/slate colored leg.
As to verifying anything else, a full profile shot would be necessary.
LofMc