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Message:: [QUOTE="GDJMSP, post: 497081, member: 112"]These are the changes - 1968 Lettering thickness revised  1968 cents have an extraordinarily smooth and featureless effigy of Lincoln.  The lettering is measureably thicker in cross section than for prior years.  Not noted in the reference books.  VDB is very sharp on coins of this year,  unlike those prior. 1969 Obverse revised, effigy smaller, low relief  This new effigy is similar to the original 1909, but not identical.  Much  detail restored, but the relief is very low so that the coins and dies wear  poorly. 1970-1972 Obverse revised, higher relief portrait  Virtually identical to the above, but appears to be higher relief to me.  Not noted in reference books, excepting the 1970-S high vs low 7.  Note how some collectors use the low relief of the lettering as diagnostic  for the 1970-S high 7 (not reliable, since an overpolished low 7 die  will also have low relief lettering) 1973 Obv & Rev revised, FG larger1974-1982 Obv? & rev revised, FG smaller1982-1985 Zinc, with revised obverse  Color changes to pink-red.  Full red bronze vs copper-coated zinc cents  are very obviously different colors when viewed under a good light source.  All of the combinations of die changes and planchet changes exist.[/QUOTE]