SN19<br />there should be another number which would be the model number. something like: 115893 for pre 1980 and 115MLCR for 1980 and up. 80 and up they used letter codes for year
the last two letters were used and the code is:<br />1 = I<br />2 = N<br />3 = T<br />4 = R<br />5 = O<br />6 = D<br />7 = U<br />8 = C<br />9 = E<br />0 = S
