Boulenger bottle coasters set of 3

In silver plated metal, boulenger goldsmith they are marked: boulenger and a square punch containing the letters a and b external diameter: 13.8 cm base diameter: 10.5 cm the lot is made up of 2 identical elements and another with a less marked edge hem. The dimensions are identical no deformation, no shock. Scratches from use and some oxidation spots.