{"subtitle": "Old Sheffield plate makers' marks 1743-1860", "title": "British and Irish silver assay office marks, 1544-1968, with notes on gold markings and marks on foreign imported silverand gold plate", "created": {"type": "/type/datetime", "value": "2011-11-05T05:02:25.321675"}, "last_modified": {"type": "/type/datetime", "value": "2011-11-05T05:02:25.321675"}, "latest_revision": 1, "key": "/works/OL16249409W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL4328468A"}}], "type": {"key": "/type/work"}, "revision": 1}