Help! I have 3 pieces I need help with. Each piece is marked 830s Lo. I know the maker mark and I know what the 830 means but I can not find MY particular pieces anywhere on the web. One is an envelope opener with no design. Another is a wax stamp. I’m not sure what the stamp is. And the last is this very small plate. I’ve googled everything and can not fibd these pieces. Any help would be greatly appreciated.