MAX SCHAFFER Slip Shade Sconces (4) Matching Art Deco

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MAX SCHAFFER Slip Shade Sconces (4) Matching Art Deco ?
I have not cleaned these lights recently and they still look great.
Sconce #1 - Cracked on the back
Sconce #2 - Appears good
Sconce #3 - Cracked on back and around the front (which I just noticed when I enlarged pics) and mended (glued?)
Sconce #4 - Cracked on back but less than other two
There may be minor chips on “ears” and bottom rims that fit into metal holders
Absolutely heavy and GORGEOUS!!  Believe they may have come from a New York Brownstone.
As depicted by photos, the cracks at the back of the pieces are not noticeable or visible from the front of the lights when hung (now, with the exception of Sconce #3).