What is the value of a 1935 A US 1 dollar bill with a gold seal?

The seal color is actually considered to be yellow rather than gold. All yellow-seal $1 silver certificates were dated 1935 A.

As of 12/2011, these bills sell for $10 to $20 in circulated condition. A nice uncirculated one can bring $200 or more.

During WWII special bills were printed for use in threatened or combat areas. They had distinctive ink colors (yellow for North Africa and brown for Hawaii) so they could be easily recognized and declared worthless if they fell into enemy hands.