Steinklein Furniture Grand Rapids Furniture Dinning room Set

Hello,

I was gifted this dining room furniture piece by a neighbor of mine. This piece was also gifted to my neigbors when they had purchased their house by the owner who was moving into nursing home. No further information was given to me, but the detail on these pieces are exquisite. I would like to know if this piece is actually manufactured during the 1900's. I found a tag stating that it was from a compay called Steinklein Furniture Co, design of Grand Rapids Funiture and has a new york city address. I have posted the picture for your viewing. I would like to know how much these pieces are worth and how would one look to sell  such furniture? Is this work keeping?