I have noticed a minor upset on all 4 of my 1960 Half-pennies. Can anyone confirm this? Is there a reference list of all known pre-decimal upsets among other errors?
I don't have any at hand but a lot predecimals have minor upsets I think. Possibly orientation was done by eye in the early days?
How minor would you say they would be.
Quote from: 'gnome' pid='98226' dateline='1474174102'How minor would you say they would be.
(http://i1149.photobucket.com/albums/o598/noelosdub/IMG_6494_zps2zzylrmc.jpg)
(http://i1149.photobucket.com/albums/o598/noelosdub/IMG_6495_zpsj8jcejrc.jpg)
Ok thanks, :)
Doesn't look like much, how many degrees is that?
TO ME , IT LOOKS LIKE NO DEGREES AT ALL .
I would say that it is well within tolerance, It takes a fair bit of rotation to become interesting But Well spotted though :good:
Quote from: 'trout' pid='98250' dateline='1474202480'I would say that it is well within tolerance, It takes a fair bit of rotation to become interesting But Well spotted though :good:
Noted.
This is very common on pre-decimals. Not much interest in slight rotations.
When the RAM production floo r was opened to the public some years ago, several of the defunct Secret Squirel coin forum visited Canberra for a dinner and RAM inspection.
During this inspection, I was informed that the tolerance of the head/tails was within +-15 degrees.
It is possible that this applied to pre decimal coins as well.
I have heard tales of that coin forum
that +-15 degrees tolerance sounds fairly right
we see a lot of coins sitting within those degrees of rotation
and many others outside of that - so this 1960 halfpenny could be the start of a full rotation set in years to come
I'd heard 5% mentioned before, but yeah, it's got to big to be appreciable.