All markings are worn away. No makers mark or gold stamp. Compartment is stuck fast as far as I can tell without damaging the ring. The item "Vintage Men's 10k Gold Hinged Secret Compartment Poison Ring Rare 7grm" is in sale since Wednesday, May 04, 2016.This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Retro, Vintage 1930s-1980s\Rings". The seller is "taylorjillmarie" and is located in Albany, New York. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, SE, KR, ID, to Taiwan, ZA, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, SG, NO, SA, AE, QA, KW, BH, HR, MY, TR, BR, CL, CO.