I think this is late 40s, from quality Parisian maker Andre Dallioux.  

An elegant velvet clutch, with monogram MM (unfortunately think a Marilyn link would be stretching it!)

The base is a lozenge shaped goldtone metal, with black cold enamel detail. The upper is made from what feels like a silk velvet, envelope style. 

It fastens with a single snap to the centre which is marked with a patent.

Interior is a silk satin, printed with makers name. One large inner compartment, three small mirror/comb pockets. 

Measures: 

7 1/4” wide at base / 8 1/4” across top

5” high 

just under 2” front to back

Condition:  Good and useable, but not perfect as a number of minor issues. All issues shown in photographs

- Cold enamel has been repaired in places (all shown)

- some rub to edges of velvet flap

- two ridges/lines in velvet to back top flap 

- wear to finish of female snap

It’s still a pretty stylish thing - there’s a wonderful bag by the same designer in the Met museum. 

Condition: