I recently found a 1951 20 centavo in a dealer's junk bin and was surprised to find that it (and the next year) have ridiculously high posted values. Is there some reason that these two dates are semi key? The mintage numbers aren't particularly low (although they are lower than years just before and just after).
I can tell you that regardless of what the book says, no one pays a premium for these. I sold a lot of Mexican 20 centavos awhile back and $1 per coin is all you'll get, no matter what the date.
Krauses pricing on these is about 20 years old. There is very little interest in most Mexican issues dated after 1930. There are some exceptions, but very little. It's a shame though; the 20 centavos bronze issue is a handsome coin in UNC or BU red.
I agree, it is a shame. This series and the brief late 1950s 50 centavos set are the ones that got me into Mexican coins. It's hard to understand why more collectors don't see the appeal of these.
