Do's anybody know what is the +/- Weight is for the Royal Mint 1971/1992 Two Pence is as the Royal mint Quotes 7.12g Exactly and the One Pence is Quoted at +/- 0.000005g this in itself seems hard to Achieve let alone an exact weight.
From https://thecoinexpert.co.uk/blog/what-do-uk-coins-weigh : Originally minted in bronze but now minted in copper-plated stainless steel, the composition of the 1p coin has had to change over the years due to rising metal prices but the specifications for the 1 pence coin as set out in the Decimal Currency Act of 1969 have not changed and mandated that the weight of the coin should be 3.564 grams ±0.000005g.
and: Perhaps unsurprisingly, a two pence coin weighs double that of the once pence coin, coming in at 7.12 grams. (No tolerance stated.)
I can't believe ±0.000005g is the actual tolerance on an individual coin (compare to the similar US penny at +/- 0.1g). In the first place, as you imply, it would be impossible to maintain without scrapping the vast majority of the coins, and secondly, it's ludicrous to think they would measure weight to 6 decimal places for a coin produced to 3 decimal places. So the definition of that tolerance must be for something else than an individual coin. My guess is that it's for an average tolerance of many coins (perhaps the entire mint run) and the tolerance on an individual coins is more in line with production reality, such as +/- 0.1g. In that way every coin that is overweight by 0.1g would be offset by a coin that is underweight by 0.1g for a net average tolerance of 0.0g.
Just a guess. Maybe the tolerance on the 2p is the same?
Thema verschoben nach "Numismatic questions"(ZacUK, 8 Okt. 2021, 20:33)
Verweis : "rsirian1"From https://thecoinexpert.co.uk/blog/what-do-uk-coins-weigh :
Originally minted in bronze but now minted in copper-plated stainless steel, the composition of the 1p coin has had to change over the years due to rising metal prices but the specifications for the 1 pence coin as set out in the Decimal Currency Act of 1969 have not changed and mandated that the weight of the coin should be 3.564 grams ±0.000005g.
and:
Perhaps unsurprisingly, a two pence coin weighs double that of the once pence coin, coming in at 7.12 grams. (No tolerance stated.)
I can't believe ±0.000005g is the actual tolerance on an individual coin (compare to the similar US penny at +/- 0.1g). In the first place, as you imply, it would be impossible to maintain without scrapping the vast majority of the coins, and secondly, it's ludicrous to think they would measure weight to 6 decimal places for a coin produced to 3 decimal places. So the definition of that tolerance must be for something else than an individual coin. My guess is that it's for an average tolerance of many coins (perhaps the entire mint run) and the tolerance on an individual coins is more in line with production reality, such as +/- 0.1g. In that way every coin that is overweight by 0.1g would be offset by a coin that is underweight by 0.1g for a net average tolerance of 0.0g.
Just a guess. Maybe the tolerance on the 2p is the same?
Thank you for your Thoughts with there being no +/- Figure for the 2P I decided to Weigh a few and found the Heaviest to be 7.31g and the Lightest 7.02g (that Makes + 0.19g and - 0.1g )So assuming the Mean is 7.12 the +/- Would most probably be +/-0.2g. Then I did the Same with the 1p the Highest weight being 3.61g and the Lowest 3.49g -0.073g + 0.056g so I believe your Figure for the 1p is Correct at +/-0.1g.That means there should be no 2ps above 7.32g and below 6.92g.
Further to.
I have checked 100 2p and found the Weight Range between 7.00g and 7.41g that's +/- 0.25g with this information I have sent an enquiry to the Royal Mint and will post there answer when and if I get One.
Ian.
Yes you are correct I used a Calculator this Time so I hope my Calculations are Accurate.
7.128g being the Mean +/- 0.2g (6.928g Bottom Limit 7.328g Top Limit )
7.128g - 7.0g = 0.128g Within Tolerance
7.41g - 7.128g = 0.282g 0.082g Above Tolerance
So 0.082g is here nor There on 1% of 2p Coins but I suppose over 10,000 Coins 1% = ( 100 2ps ) or 8.2g that's just over the Weight of 1 Two Pence Coin.
Is my 2017 £1 on a 8.22 wrong planchet error coin value
No, I don’t see anything that would make it worth above face value unfortunately.
For next time, instead of reviving an old irrelevant thread, I would recommend creating your own post to get the best answer and maintain continuity and flow in the forums.
