HAD PURCHASED A GROUPING OF NAPKIN RINGS FROM A NAVAL RETIREE WHO SAID THE ITEMS WERE FROM NAVAL VESSELS WHICH VISITED THE PORT OF HALIFAX, NOVA SCOTIA. THIS WEB SITE IS AN INCREDIBLE USEFUL TOOL. THE MARKINGS : CRESCENT MOON, CROWN, 800 AND LETTER S IN A CIRCLE. NEED HELP TO IDENTIFY MAKER AND AGE....