This Stevens manufactured lever is for the Favorite model 1915 single shot falling block rimfire rifle and is in very good condition exhibiting a grayish brown patina with light wear and possibly some light pin prick pitting.  (file photo)

Note: Stevens Favorite model 1915 rimfire rifles with the following serial (batch) numbers have been observed with this part: E145, E805, K80, L50, L679, Q539, T832 & Y788