With the research I have done in the past I would say your bike is from about 1914 going by the serial number. The best thing to do with it is to just spray and wipe it down with some penetrating oil and leave it at that. It is the sort of bike that the patina gives it history and value and "restoration" will just be damaging it unless done by a genius/artist/historian. From the information in this thread, which seems to be sort of languishing lately, I came up with this serial number list which I think is the best there is according to actual documentation:
1899 no higher than or ending at 52,000
1900 " 62,000
1901 " 72,000
1902 " 82,000
1903 " 92,000
1904 " 102,000
1905 " 112,000
1906 " 122,000
1907 " 132,000
1908 " 142,000
1909 " 152,000
1910 " 162,000
1911 " 172,000
1912 ending with 182,000
1913 " 192,000
1914 " 202,000
1915 " 212,000
1916 " 222,000
1917 " 232,000
1918 " 242,000