SERIES 1981 $20 by COMPLEX BLOCKS Circulation production: AA. BA. CA. DA. EA. FA. GA. HA. IA. JA. KA. LA. AB. BB. CB. DB. EB. FB. GB. HB. IB. JB. KB. LB. AC. BC. EC. GC. JC. LC. BD. ED. GD. LD. BE. LE. BF. A*. B*. C*. D*. E*. F*. G*. H*. I*. J*. K*. L*. Total: 37 regular + 12 star = 49. Special production: none. Grand total: 49 different, 49 overall.