Good Morning,
Drom some of mine look exactly like your last hen. Good to know with the proper roo it can possibly be worked around.
I was only able to visit one breeder who belonged to the Marans club of France. His birds were still young he said (translated though)
Also, the Marans would not let me get close to them, they were very spooked. I would say that their hackles were a very nice dark copper color. There wasn't alot of it but it was more than the last hen of yours and less than the first.
The Roo looked like he was coloring up well in the very nice (not brassy) copper.
Some of the had excellent bodies and at least one that I saw had a squirrel tail (unless the feathers were just worn off her back and it only looked that way due to no feathers.)
Overall, the Marans hens that I saw in France in the "Markets" Were very brassy hackled. These would be the typical hens sold for egg laying over there.
It is correct that you just never see a white egg and the shades of brown varied also. On a Marans scale I would say a 3-5 were the average color in the market and stores. I saw no "chocolate ones" anywhere.
These pictures are terrible but it was the best I got because those birds would not hold still and would run and hide everywhere. The third picture is what looks like a squirrel tail to me.
Here are the typical birds sold alive at the Market
And these are the eggs from my new French friends (the eggs look better in person) and they said that people come from all over France to purchase hatching eggs from them at 1.50 Euro per egg which is about 2 dollars American right now (I think):