The Postcard above was posted from the Norddeutscher, (North German) Lloyd Liner "Bremen" at sea to Mrs. Mary Read in Pawtucket, Rhode Island. It was posted on June 28th and received at Pawtucket on July 11, 1913. The card was misdelivered and forwarded to an address in Massachusetts.

The face of the card shows the Eddystone Lighthouse. Eddystone Lighthouse is perhaps one of the most famous lighthouses in the world. It is located on a group of treacherous rocks about 14 miles at sea; south of Plymouth Harbor, England. It was first constructed in 1703 and the present tower, the fifth on the site was built in 1882.

Sea Post or Sea Post Office markings are found on covers and cards posted at sea during the heyday of the of the Passenger Liners from about 1891 until around 1940. The difference between the Sea Post marking and the Paquebot marking is that Sea Post was applied to letters posted on post offices located onboard the ships and Paquebot markings were applied at shore post offices to mail received from ships that did not have onboard post offices.

Two United States Steamships that included onboard post offices for posting and sorting mail at sea were the St. Louis and the St. Paul owned by the Inman and International Line. The 10 cent Pan American Exposition issue of 1901 depicts the American Line steamer "St. Paul." One of the great rarities of American Philately is the inverted center error of this stamp. There are only 3 recorded usages of the error stamp on cover; one of which sold for $121,000.00 in 1999.
SEE: 1901 Pan American Issue & Blow-Up of the German Sea Post Cancellation

The stamp is the 10 pfennig Lilac-Red Kaiser Wilhelm II issue of 1905-1919. Wilhelm II was the last Kaiser of the German Empire. He was also the grandson of Queen Victoria.

The steamship Bremen was constructed for the North German Lloyd Line at Danzig, Germany and launched on November 14, 1896. She was the second steamship of that name. Bremen was 525 feet in length with a beam of 60 feet. She sailed on her maiden voyage to New York on June 5, 1897. In 1900 after a fire at the docks in Hoboken, New Jersey, she was refitted and lengthened to 550 feet. Bremen completed her last voyage to New York on June 20, 1914. She was surrendered to Great Britain after World War I and operated by the P & O Line to Australia. She was sold again in 1921 to the Byron Steamship Company; renamed Constantinople and operated between Piraeus, Greece and New York. In 1924 the ship was renamed King Alexander and operated between Piraeus, Patras and New York . The ship was scrapped in 1929.