1st class Mariinsky Badges of Distinction for Impeccable Service made by Eduard workshop /ВД/

1st class Mariinsky badge for 30 years of impeccable service.

Gold, enamel.
Size 46 х 45.5 mm.
Weight 11.11 g.

Marked with St. Petersburg district assay office gold mark "alpha, female head in kokoshnik to the right, 56" and maker's mark "ВД/VD" for Eduard workshop master Vladimir Yakovlevich Dinakov/Владимир Яковлевич Динаков and "Эдуардъ/Eduard".
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Same badge under a different light.

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Yet another set of photos of the same cross.