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identify7Certainly the rarity and cost impact associated with the back variations of the t206 set is well studied and fairly well documented. Similarly documented are the more subtle back color variations, bio differences, errors and other varieties of the sets from the '50s and thereafter.
Less well defined are the rarity of the color variations, pose variations, counterstamped backs, Barker type back notations, etc. To my knowledge there is actually no documentation of the population of any of these pre-war variants.
Are there references available which identify or approximate the population of, for example:
OJs by pose,
w517 by color,
Barker annoted OJs,
etc.?