Vintage Birks Two-Tone 18k White and Yellow Gold Ring Band (Size 10)

Birks two-tone 18k white and yellow gold ring band.  ID#: RG1045 Metal: 18k white and yellow gold Size: 10 1/4 Band Width: 4.8mm  Weight: 6.88g  Markings: 'Au750' 'acredo' 'BIRKS'  *acredo is a German manufacturer