TLC New vintage 925 silver puzzle ring (Large)

TLC New vintage 925 silver puzzle ring (large) Very large, very heavy, solid silver! 14 mm wide x 23 long knot (curved) Size 10 New vintage c. 1970s. Genuine solid silver. Hallmarks: “TOB” (band) + “925” and “???” (Underside of knots). Note: polished with aluminum foil, vinegar, baking soda. Note: TOB hallmark on some Italian jewellery. Note: I couldn’t remove all of the tarnish. The price is reduced a little.