First ocean to ocean submarine mail service cover
{"id": "ld1-1674813123617-1674813132470-0", "version": "", "unitCode": "NPM", "linkedId": "", "type": "edanmdm", "content": {"freetext": {"date": [{"label": "Date", "content": "1919"}], "notes": [{"label": "Description", "content": "used"}, {"label": "Description", "content": "The official penalty cover was carried aboard the U.S.S. C-3 on the first official trip of submarine mail service from Atlantic to Pacific Ocean. It was postmarked Cristobal, Canal Zone, Atlantic - Pacific, May 7, 1919 and back(?) canceled Balboa Heights, Canal Zone / Received / May 7 1919 ... First Trip Submarine Mail Atlantic - Pacific."}, {"label": "Description", "content": "[Research the C-3 and the circumstances surrounding the submarine mail service. What ever happened to the pictures that Virginia Spear spoke of in her Sept. 14 letter.]"}, {"label": "Description", "content": "Mr. Spear worked at the U. S. post office in Ancon, Panama, during and following the building of the Panama Canal."}], "place": [{"label": "Place", "content": "United States of America"}], "setName": [{"label": "See more items in", "content": "National Postal Museum Collection"}], "dataSource": [{"label": "Data Source", "content": "National Postal Museum"}], "identifier": [{"label": "Object number", "content": "1993.2005.1"}], "objectType": [{"label": "Type", "content": "Covers & Associated Letters"}], "physicalDescription": [{"label": "Medium", "content": "paper; ink"}, {"label": "Dimensions", "content": "Height x Width: 4 3/16 x 9 1/2 in. (10.6 x 24.1 cm)"}]}, "indexedStructured": {"date": ["1910s"], "place": ["United States of America"], "geoLocation": [{"Other": {"type": "Place", "content": "United States of America"}}], "object_type": ["Correspondence", "Covers & letters"], "online_media_type": ["Images"]}, "descriptiveNonRepeating": {"guid": "http://n2t.net/ark:/65665/hm87279117c-bdfd-4b13-ae75-6823d33358eb", "title": {"label": "Title", "content": "First ocean to ocean submarine mail service cover"}, "record_ID": "npm_1993.2005.1", "unit_code": "NPM", "title_sort": "FIRST OCEAN TO OCEAN SUBMARINE MAIL SERVICE COVER", "data_source": "National Postal Museum", "record_link": "https://postalmuseum.si.edu/object/npm_1993.2005.1", "online_media": {"media": [{"id": "damsmdm:NPM-1993_2005_1", "guid": "http://n2t.net/ark:/65665/sy74fa1bed4-e2e3-4b16-a5a5-bf35b808ef64", "type": "Images", "idsId": "NPM-1993_2005_1", "usage": {"access": "CC0"}, "content": "https://ids.si.edu/ids/deliveryService?id=NPM-1993_2005_1", "thumbnail": "https://ids.si.edu/ids/deliveryService?id=NPM-1993_2005_1", "resources": [{"label": "Screen Image", "url": "https://ids.si.edu/ids/download?id=NPM-1993_2005_1_screen"}, {"label": "Thumbnail Image", "url": "https://ids.si.edu/ids/download?id=NPM-1993_2005_1_thumb"}]}], "mediaCount": 1}, "metadata_usage": {"access": "CC0"}}}, "url": "edanmdm:npm_1993.2005.1", "hash": "002a7a29791ac909f6198b9e673fe1c085cb3331", "docSignature": "446e2dcd1e7dd3e88f059336631b58e9", "timestamp": 1674813164, "lastTimeUpdated": 1674813164, "title": "First ocean to ocean submarine mail service cover"}