Desire info on origin, age and estimated value of my antique dining set w/ 4 chairs

I just acquired this dining set from my mother. She purchased it in an antique store many years ago. The table is incredible heavy. It has pull outs with fold down legs on each side. I do not have the leafs. The chairs are heavy, carved with embossed leather on the seat and seat back. there are metal rivets or studs around the leather. I find no marks or names anywhere. I would love to know a little more about it if anyone knows!

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