What is the value of a 1950 US 5 dollar bill with a yellow seal?

Answer 1

Yellow and brown seals were used on special 1934-series $5 bills printed for use in Hawaii and North Africa during WWII, but all 1950-series $5 bills should have the familiar green Federal Reserve seal.

If your bill's date is 1950 the seal color could have been altered by exposure to chemicals. Even something as relatively benign as laundry detergents have been known to cause color changes. That alteration would be considered post-printing damage. However 1950-series $5 bills are only worth $5 to $7 undamaged, so your loss would be minimal.