Posted By:
DavidHal,
You are correct both in the time span and that the back series relates to the year (Sweet Caporal 150 subjects = 1909, etc). I know for a fact that others reading this board know more than I about the specific T206 back variations (Broadleaf with a double-helix overprint, etc). In other words I will not attempt to be more specific, for fear that Art Martineau and Doug Allen will toss a 'First Hundred Years' galley proof at my head (Not that I think they'd actually do that, but you have to be careful in this day and age).