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DaveG38

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  1. Two ways, but neither is expecially satisfactory. Firstly, when spun on a metal surface and allowed to come to rest, the debased silver 'rings' at a higher pitch than sterling silver. To understand the difference, simply spin a pre-1920 and a post 1920 and listen to the difference. However, I have no idea, apart from chemically, how to determine which alloy mix was used for the debased silver types. Secondly, if the coins are very high grade, you may be able to examine the serifs of the 'Es'. Sterling silver coins have sharper points due to better metal flow, although the difference is tiny.
  2. Hi Declan, Its just powdered sulphur. In the form of flowers its a yellow powder, but if melted, Sulphur turns into a dark red liquid that then solidifies into a similar solid lump. Put a match to Sulphur and it burns with a blue flame and gives off the acrid smelling Sulphur Dioxide.
  3. The Egyptian Arch pound coin looks like one of the many fakes out there.
  4. 40 years ago

    Quote from Wikipedia ' Dawson left after frequently arguing with Daltrey[7] and after being briefly replaced by Gabby Connolly, Daltrey moved to lead vocals.' Of course, Wiki may be wrong.
  5. 1717 Halfpenny

    OK. Thanks for that. Yet another variety in the collection!!!
  6. 1717 Halfpenny

    Michael, Thank you for this. Does this mean that the larger diameter coins are thinner than the standard ones, due to the lack of collar, or is it that the flans were larger anyway?
  7. Yesterday, I was happily annoying my bank by taking several hours sorting out my collection. One of the tasks that I did was to compare new and original examples of coins to see which I should keep or which ones are maybe different varieties. Whilst looking at my two 1717 halfpennies, I noticed that one of them seems to have been struck on a much larger flan the the other. The smaller is 25mm across, whereas the other is 27-28mm across i.e. noticeably larger. Also, the legend over the bust is as per Peck for the smaller flan type, but is aligned differently for the larger one. Does anyone know if this halfpenny was struck on a larger flan? Peck doesn't say anything about this, apart from the proof which this clearly isn't (not unless it is a well circulated proof).
  8. I've now tried a new technique for me, based around my knowledge of chemistry, which seems to have worked. I mixed a small quantity of flowers of sulphur with water and a squirt of washing up liquid (Fairy Liquid for the purists), and mixed it up for an hour or so. Then I placed the silver coin to be toned in the sludge of sulphur at the bottom of the cup. Left it for about half an hour, then turned the coin so that the other side was facing down into the sludge. Then I monitored the toning as it proceeds, regularly turning, until I got the shade of grey that matched the other coins in the made up set. Washed the coin under clean water and dabbed it dry. The result was pretty good, with the fourpence toning slowly and nicely down to very near the other coins over a period of 5 hours or so. No funny colours or other effects, so now the set looks like it has always been together. For a control, I also placed a scrap George IV crown into the mix and just left it. The whole thing turned a very dark grey, almost black over 24 hours. I wouldn't recommend this approach, but the method I used certainly brought very good results for a one off coin. The only caveat on this method is that it is important to monitor the coin and turn it regularly, otherwise the toning won't be even from one side to another. I also wouldn't use this technique on anything really valuable, but for a cheap fairly common coin I was pleased with the results. All this method has done is reproduce, in a cup, the effects of sulphur in the atmosphere over a period of many years. The chemistry is very basic. The sulphur reacts with the Silver and Copper in the surface of the coin to produce the respective Sulphides, which are black. Hence the black tarnish to Silver that accumulates over the years. Simples!
  9. 40 years ago

    A right motley looking lot!
  10. Ebay's Worst Offerings

    All from this forum I guess.
  11. 40 years ago

    Fabulous song. One of their best.
  12. This listing gave me a chuckle this morning...

    Not a bad replica compared to many I've seen.
  13. Ebay's Worst Offerings

    Holed and in that grade and asking £349.99. What planet do some of these idiots live on? Surely, even the biggest coin collecting mug on earth would think twice about that?
  14. I thought that Prince Philip still had a large collection - am I wrong?
  15. Nice one. I hadn't noticed that comment.