Excessively rare to find Manx errors. Info I have been given from a very reputable dealer, a really nice guy who has 'something like 250 A4 sized volumes of research on Manx coins, tokens, banknotes, medals, maps and pictures covering the past 50 years.
"I confirm that I have no recollection of any Isle of Man error coins coming onto the open market and certainly none have ever been sold at the likes of Spink, DNW, Bonhams, Baldwins, etc. The only piece that turns up regularly in auction, and on
ebay, is the 1978 Ascension Island/Isle of Man mule crown, of which there are stated to be around 328 in existence, which sells for around £250-£400, and I would class that as common compared to these miss-strikes"
"I don't think you can compare these Manx errors to the U.K. ones. The mintages here were very small compared to the equivalent U.K. mintages and as I said previously you just never see these Manx errors turning up and, to my knowledge, none have ever appeared for sale on the open market, other than the 1976 1p, which sold for £5,000 in 1977."
When purchased, they were described in the following way:
1) 1975 Penny - struck up on a halfpenny flan in error. Weighs 1.79 grams, as against the normal weight of 3.58 grams.
2) 1975 Penny - as last, but weighs 1.78 grams.
Both pieces now toned, but were found, together, by me in a mint sealed bag from The Treasury in 1975.
3) 1975 Ten Pence - struck up on a false planchet. Weighs 6.13 grams, as against normal weight of 11.30 grams. Edge is partly milled.
Found by me in a mint sealed bag in 1975.
4) 1976 Penny - struck up on a halfpenny flan in error. Weighs 1.77 grams, as against the normal weight of 3.58 grams.
Found by me in a mint sealed bag in 1976.
I attach copies of two articles that appeared in The Manxman magazine in 1976/1977 regarding a similar 1976 penny that was found in a mint sealed bag in July, 1976. The flan was tested and found to be made of aluminium-bronze. I have never subjected my piece to any tests, but it would appear to be struck in the correct metal, which it would be if it was struck up on a halfpenny flan. The coin in the article was put up for auction at Chrystals Auctions, Ramsey, in June, 1977, where it sold for the incredible price of £5,000 - purchased by a retired millionaire resident called Bill Greenwood. Greenwood died in the 1990's and the coin has never turned up! Following the auction there was a court case where the lady who found the coin was sued by her employers for the full amount of the selling price, on the grounds that the coins were their property and not hers. I think the case was settled out of court, but I can't remember the exact details other than she lost her job as well.
5) 1992 Ten Pence - struck up on a false planchet. Weighs only 5.21 grams, as against the normal weight of 6.55 grams. It looks like aluminium, but I have never had it tested. The edge is plain and not milled.
6) 2008 Five Pence - struck up on a false planchet. Weighs only 1.96 grams, as against the normal weight of 3.28 grams. This appears to be struck up in brass, but the edge is milled correctly.
I'd like an idea of price on these IF I were to sell/for insurance purposes. I really love these pieces and would rather not sell but everything has a price and 50ps are my main priority - if something came up and I needed to part with something, the Manx errors would be the first things to go as they don't quite fit in with the rest
Here is a link to a gallery where you can see them:
http://jpegbay.com/gallery/004440546-.html#1