The first printing of Courtney signature occured on the 1900 4$ issue. There were only 4 4$ notes issued. 1882, 1900, 1902 with Courtney Signature (Numeral 4 at top) and 1902 with Boville signature (word FOUR at top)-Final $4 issue. There were no 1911 $4 notes.
Your 1902 note is quite rare and is worth $6,000 in VF
in 2009 there had only been 63 of these notes recorded to that date with EF being the highest grade in any private collection.
Hope this helps.