Tenth digit - Year Code
80(A), 81(B), 82(C), 83(D), 84(E),
85(F), 86(G), 87(H), 88(J), 89(K),
90(L), 91(M), 92(N), 93(P), 94(R),
95(S), 96(T), 97(V), 98(W), 99(X),
00(Y), 01(1), 02(2), 03(3), 04(4),
05(5), 06(6), 07(7), 08(8 ), 09(9)
Not that they made blasters in 81, but that's funny that it makes a smiley!! If tenth digit is B, it's a 1981 model...and not a blaster! B)