Larry & Robin, how the dollar grade correlates with the later number (or letter) grades I am not especially sharp on - especially as Bruce mentions "before discounts" which were common - but as Robin points out, the grade 3 or D-grade had no 'teardrop', the grade 5 or B grade had a 3/4 length teardrop, the grade 6 or A grade had the full-length teardrop and the grade 4 or C grade had the shortest teardrop but, unlike the grade 3 (D), the C at least had the beginning of a teardrop.
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