Well according to George Madis it would be 1911,but his are not always correct.
The only way you can be sure is to go to www.codyfirearmsmuseum.com
It's not free but you'll know for sure.
Madis dates are a little early so my guess is 1912.
Good Luck
Your Winchester model 1890 pump 22cal. rifle was made by Winchester in 1917.
Your winchester model 1890 was made by winchester in 1910.
Your winchester model 1890 .22cal rifle was made by winchester in 1902.
With the serial number that you have supplied,your Winchester model 1890 pump action .22cal rifle was made in the year 1908.
your Winchester model 1890 was made in 1914.
With the serial number that you have supplied;your Winchester model 1890 pump action rifle was made in the year 1912.
your Winchester model 1890 was made in the year 1910.
With the serial number that you have provided,your Winchester model 1890 pump action .22cal rifle was made in the year 1927.
With the serial number that you have provided,your Winchester model 1890 pump action .22cal rifle was made in the year 1909.
With the serial number that you have supplied,your Winchester model 1890 pump action .22cal rifle was made in the year 1927.
With the serial number that you have supplied,your Winchester model 1890 pump action .22cal rifle was made in the year 1903.
If you mean the model 1890 Winchester 22? then your rifle was made in 1911.