The short answer to whether the RCM has acknowledged the 1969 large date 10c is yes, unofficially. I got the story from the then Chief Engraver. Because of the way the RCM was making matrices for successive years of a given denomination, the design gradually spread, reducing the size of the "flat" at the rim. When the flat got too small and/or the design got too mushy, a new reduction was made and the process started over. The 1969 large date 10c wasn't an error, it was simply the end of the line for the punch used to make the first matrix for that year. It was decided very quickly that a new reduction would have to be made and a major design remodel occurred (the small date variety) in the process. The rarity of the 1969 large date suggests that it was the output of a single die. Whether that die was put into production deliberately or accidentally I don't know.



















