New vintage sterling 925 silver hammered dome cocktail ring alpha

New vintage sterling 925 silver hammered dome cocktail ring alpha Simple shape, beautiful workmanship, minimalist style. Rustic micro hammering, probably by hand. It’s easy to see on the inside but just barely visible on the outside. So Polished and shiny that it is hard to photograph! Concave dome is about 1 cm deep. Width is about 18 mm. Band is +2 mm at narrowest. Size 6 New vintage c. 1970s. By Artistic Jewellery Canada (Alpha brand). Probably casted and handmade (hammered, polished, finished). Hallmarks: “ALPHA” on one side, very clear. “STERLING 925” on other side, not very clear. Please see other listings which are clearer. Note: there are two pits or dimples on either side of the ring. I’m not sure if that’s from the creation (I’m imagining like tongs) or in the finishing. Before and after pictures: before and after polished with toothpaste and warm water. Last picture: clearest photo of one of the ring’s hallmark