In what condition are these 1954 $2 in?? These are considered changeover notes, that is a signature changeover occured (from Bouey-Rasminsky to Lawson-Bouey) on the L/G issue. You have the scarcer of the two with only 2,040,000 printed. In circulated condition these notes are valued $3-6 each but can jump to $40 in UNC condition.
For the 1975 $50, you would need to provide serial numbers and conditions in order to determine value. hope this helps