I would guess that it's was produced around the Mid Century.
Vintage Round Convex Mirror Metal Frame Excellent Condition
Circular Mid Century Mirror Porthole Mirror Vintage Round Convex Brass Leaf
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Vintage Antique CONVEX Gold Metal Round Mirror Louis XV Style Made in England
Art Deco Round Convex Mirror Wall Hanging Peach Glass Chain 1930s Vintage
Antique Vintage Round Copper Convex Wall Mirror Ribbon Bow Reeded Hanging Chain
