Dates released

[cranky]

I was wondering if any knew the approx month of certain Varieties were released. Like The proof sets. No S on the 1970 Dime and cent DDO of 1971 S and cent DDO 1972 S. If I remember correct there were a couple of articles written but I can't recall if these were in them.
Thanks

[jfines69]

Mike Diamond may have access to that info... Maybe a PM to Mike would help!!!