SERIES 1950 $20 FRN by COMPLEX BLOCKS Circulation production: AA. BA. CA. DA. EA. FA. GA. HA. IA. JA. KA. LA. A*. B*. C*. D*. E*. F*. G*. H*. I*. J*. K*. L*. Total: 12 regular + 12 star = 24. Special production: none. Grand total: 24 different, 24 overall.