Can you help me date this mourning coat?

[Vintage Runway]

I acquired quite a few mourning pieces yesterday at a private sale. I'm wondering if you can help me pinpoint the age of this coat?

Thank you!

 

[Rue_de_la_Paix]

I might think circa 1880s. It appears to be mantle, with cape style sleeves, but I cannot get a good look at the shape.