Quote:
Interesting concept... except maybe for 1967 DDO 1-cent? Also, the 1974 DDR nickel dollars (and PL 10c) appear to be a year phenomena.
Interesting concept... except maybe for 1967 DDO 1-cent? Also, the 1974 DDR nickel dollars (and PL 10c) appear to be a year phenomena.
There are a couple of select years that appear to be subject to a year phenomenon but from my calculations, neither the 1967 1 cent DDO nor the 1974 nickel dollar DDR are within the 1-year phenomena.
If you look at the list below from the 1960s to 1970s, you will see that there are relative Doubled Dies in the surrounding years for both 1967 and 1974.
1960
1960 1 Cent - NIL
1960 5 Cent - NIL
1960 10 Cent - NIL
1960 1 Dollar - NIL
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1961
1961 1 Cent - NIL
1961 5 Cent - NIL
1961 10 Cent - NIL
1961 1 Dollar - NIL
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1962
1962 1 Cent - NIL
1962 5 Cent - NIL
1962 10 Cent - NIL
1962 1 Dollar - NIL
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1963
1963 1 Cent - NIL
1963 5 Cent - NIL
1963 10 Cent - NIL
1963 1 Dollar - NIL
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1964
1964 1 Cent - Doubled Die Reverse
1964 5 Cent - NIL
1964 10 Cent - NIL
1964 1 Dollar - NIL
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1965
1965 1 Cent - Doubled Die Reverse *Doubled bud*
1965 5 Cent - Doubled Die Reverse
1965 10 Cent - NIL
1965 1 Dollar - NIL
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1966
1966 1 Cent - NIL
1966 5 Cent - Doubled Die Reverse
1966 10 Cent - NIL
1966 1 Dollar - NIL
-------------------------
1967
1967 1 Cent - Doubled Die Obverse
1967 5 Cent - NIL
1967 10 Cent - NIL
1967 1 Dollar - NIL
-------------------------
1968
1968 1 Cent - NIL
1968 5 Cent - NIL
1968 10 Cent - NIL
1968 1 Dollar - NIL
-------------------------
1969
1969 1 Cent - NIL
1969 5 Cent - NIL
1969 10 Cent - NIL
1969 1 Dollar - NIL
-------------------------
1970
1970 1 Cent - Doubled Die Reverse V1 & V2
1970 5 Cent - NIL
1970 10 Cent - NIL
1970 1 Dollar - NIL
-------------------------
1971
1971 1 Cent - NIL
1971 5 Cent - NIL
1971 10 Cent - NIL
1971 1 Dollar - NIL
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1972
1972 1 Cent - Doubled Die Reverse *Doubled Bud*
1972 5 Cent - NIL
1972 10 Cent - NIL
1972 1 Dollar - NIL
-------------------------
1973
1973 1 Cent - NIL
1973 5 Cent - NIL
1973 10 Cent - NIL
1973 1 Dollar - NIL
-------------------------
1974
1974 1 Cent - NIL
1974 5 Cent - NIL
1974 10 Cent - Doubled Die Reverse
1974 1 Dollar - Doubled Die Reverse
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1975
1975 1 Cent - Doubled Die Obverse
1975 5 Cent - NIL
1975 10 Cent - Doubled Die Obverse
1975 1 Dollar - NIL
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1976
1976 1 Cent - Doubled Die Obverse
1976 5 Cent - NIL
1976 10 Cent - NIL
1976 1 Dollar - NIL
-------------------------
1977
1977 1 Cent - NIL
1977 5 Cent - NIL
1977 10 Cent - NIL
1977 1 Dollar - NIL
Between the 1960s and 1970s, the mint by the looks of it ran into a lot of issues that resulted in doubled dies.

Once you start looking at years prior to 1960 (1950's and 1940's etc) you will notice the spread between doubled die years starts evening out to doubled dies only happening within a 1 to 3 year period and are even harder to find.
Keep in mind the chart above is only a small-scale example for 1960 to 1970 but still applies to every year from 1920 to the present. I used the 60s and 70s as an example because within those years is where the mint seemed to have the most problems.
My main point is when a doubled die happens, it usually happens on other denominations of the same year, or other years within 2 years prior OR within 2 years after.
1967 1 Cent Doubled Die, for example, we know that for 1967 there are no other reported doubled dies found as of yet for any denomination for that time period.
However, look within 2 years prior (1966 and 1965) and you will find doubled dies.
If you look 2 years ahead you will find the 1970 Doubled Die Reverse. Keep in mind, the mint actually starts producing the next year's coinage in advance, so although the 1970 Doubled Die reverse is technically 3 years apart from the 1967 DDO, it was actually minted at the end of 1969, so by my calculations that is a 2-year stretch.
For 1974 Doubled Die Reverse nickel dollar, there is the relative 1974 10 cent doubled die reverse along with the relative 1975 1 Cent Doubled Die Obverse, 1975 10 Cent Doubled Die Obverse and 1976 1 Cent Doubled Die Obverse.
Aggressively searching Canadian Small Cents on a daily basis since 2018.
Some of my Discoveries.
1941 George VI 1 Cent DDO http://goccf.com/t/367977
1976 Queen Elizabeth II 1 Cent DDO http://goccf.com/t/373627
1970 Queen Elizabeth II 1 Cent DDR http://goccf.com/t/364301
1989 Belize 25 Cent's with a Doubled Die Reverse http://goccf.com/t/362747
Some of my Discoveries.
1941 George VI 1 Cent DDO http://goccf.com/t/367977
1976 Queen Elizabeth II 1 Cent DDO http://goccf.com/t/373627
1970 Queen Elizabeth II 1 Cent DDR http://goccf.com/t/364301
1989 Belize 25 Cent's with a Doubled Die Reverse http://goccf.com/t/362747