Does anyone know the meaning of some of the 'boxes' on the pink slip?(old style pink, 4x5 style) . One of the boxes ,near the top on the same line as date first sold, has an asterisk and yr.. the box to the right has yr. model.( I am pretty sure I can figure that one out). What does the one with the asterisk mean? Yr. model reads 67, under the asterisk and yr it reads 69. Anyone know?