Wow, I sure would get excited with an UNC 1900 DOC $4. If it's truly an uncirculated note, then you are looking at a book value in excess of $10 k.
The BOC 1937 $50 is the more common Gordon signature, book value is $1,200 UNC.
I'm no expert in Commerce notes, but the 1901 and 1917 notes will be quite rare and valuable. The 1935 is reasonably common, but still would exceed $1,000 book value in Unc condition.
I hope this helps.