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FlyingAl

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Posts posted by FlyingAl

  1. On 12/24/2022 at 10:36 AM, RWB said:

    Cloth fragments are the most commonly seen "strike through" materials. They were used to wipe die surfaces at all stages of production as well as equipment, operators' hands, washing and drying after work and before lunch, etc.

    One cannot assume anything about the order in which dies were used from strike though remnants. Most are one-and-done events because the material is destroyed by striking.

    Awesome, thanks for the info! I've seen more than a few of these cloth threads on proofs, so I wanted to check since I saw no mention of it in your book. Probably way to minor to mention anyways - better suited for FMTM!

  2. On 12/23/2022 at 3:54 PM, Mr.blister said:

    All is relative in the eye of the beholder! Certainly, if I were offered a Utra Cameo versus a mirror proof at the same price that goes without saying from a monetary standpoint.

    The procrustean way is subjective, words as good, derisible, better and superior are relative to the eye of the beholder as well.

    Nevertheless, the fact remains that all proof coins were struck at the USA MINT and struck at different stages. Using worn dies actually accentuated proof coins. In fact, worn dies did not distract or create inferior coins it produced brilliantly mirrored finished coins!

     

     

     

    Which are inherently inferior to those struck from frosted and new dies. They have weaker detail. The lack of contrast makes it harder to see the design in full. 

    Regardless of what you argue, no one sided cameo will ever match up to a two sided one, no matter what the label says. 

  3. On 12/23/2022 at 1:26 PM, Mr.blister said:

    Of course, proof mirror unfrosted coins were struck with worn dies! However, indicative of being inferior I disagree as would many other collectors that collect mirrored proof coins. Mirror proofs, Cameo and ultra cameos are categorically different stages in the life of a die not the diehard.

    Very few collectors will choose a mirrored proof over an Ultra Cameo if they are offered at the same price. They are simply not as attractive, rare, detailed, desirable, or better. 

  4. On 12/23/2022 at 9:33 AM, Mr.blister said:

    Bologna= Oscar Meyers! Or petulance?

    No comprende = don't understand.

    Yes, star graded coins = exceptional eye appeal or one side with cameo or ultra cameo contrast/devices. 

    I'm referring to mirror proofs with a star designation. One side is a mirror proof which I visually like and the other side  frosty  devices thus two distinct finishes! 

    Very simple! 

     

     

     

     

     

     

    Yes, and it is indicative of a high quality die being put with a low quality die. Maybe lower pops, but inferior coins.

  5. Roger, were dies ever wiped/covered or perhaps packed with some substance containing strings like a cloth before use? 

    I ask because I came across a 1942 proof quarter recently that appears to have been struck by new dies. The coin shows multiple strike throughs that appear to have come from threads, which would confirm the coin was among the first struck by the die pair if the above was true.

  6. On 12/16/2022 at 7:14 PM, RWB said:

    Basined dies have a uniform radius of curvature which allows use of a single "basining disc" to be use to smooth the field AND uniformly maintain relative relief detail.

    The dies on SG and Pratt gold were also curved, but it was not a uniform radius. Thus, smoother was necessary at specific places so that the relief would not be ruined.

    Abrasives were used to remove or lessen clash mark damage, superficial cracks and light spalling. If a die had a uniform radius of curvature (convex) this could be done with a single tool used by someone with limited experience.If the die had an irregular basin, it required the work of an expert to do it correctly. (This was the reason for changing from 8 TF to 7TF on 1878 Morgan dollars.)

    Was this corrected as time went on like the other basined dies? If so you'd think a PL or two example would exist. 

  7. On 12/9/2022 at 7:26 AM, RWB said:

    Well......That wasn't the reason for bringing back proofs in 1936 but it was for making mirror proofs. The technical reason was that by 1936 all the renaissance designs had been altered to have uniform basins -- these could be polished easily.

    Of course. How much do you think collectors repeatedly asking the Mint when proofs would be available influenced the decision?

  8. On 12/9/2022 at 4:25 AM, olympicsos said:

    Yes and I see why given how the overzealous polishing led to the loss of detail. Sandblasting probably brings the design out more. 

    While it does - the mint decided to ignore the designers and listen to the people who actually bought the coins - the collectors. This was essentially a business for the mint, and it wanted to make money from it. You don't make money by ignoring the needs and wants who buy your products. The collectors wanted mirrors, so mirrors it was!

  9. On 12/7/2022 at 8:46 AM, GoldFinger1969 said:

    So the proof dies were used on presses with higher tonnage pressure, correct ?

    How often would the proof dies have to be changed ?  I know from Saint/Morgan strikes that the regular coin dies could go for tens of thousands.....are we talking dozens, hundreds, or a few thousand tops with proofs ?

    Proof dies could last anywhere from around 300 coins to over 7,000 1936-42. 

    I'd say average was around 2,500 for those years, but that's off memory.

  10. One question I've been thinking about recently:

    1938 proof nickels are visibly different from the other nickel dates of the era in several ways, but none more pronounced than the wide obverse rims. This all but disappears to a thin rim in 1939, due to what I presume was caused by a changed master die.

    Am I correct in my assumption, or is there something else that caused the wide rims?

  11. On 12/3/2022 at 9:22 AM, GoldFinger1969 said:

    (1)  A proof die and a circulation die are the same -- except for the finer detail on the proof die and the polish, right ?

    (2)  They each used the same press, except in certain cases some coins could use a medal press, right ?

    Interesting thread.....but FWIW, the RWB Saints Book Thread still has a 71 page lead !! xD

    1. Yes, the only difference is the polish. 

    2. No, proofs always used a strike strike on a medal press. This has a completely different striking process and causes metal to flow differently, which causes exaggerated wear on dies. 

  12. On 12/3/2022 at 9:19 AM, RWB said:

    Nice comments both here and across the railroad tracks!

    Proof coin dies did not "age" in the same way as production dies. The higher pressure and differences in force application caused accelerated fatigue, and exaggerated surface changes. Proof dies were also readily influenced by the depth of polish given to planchets. Thus, even a small quantity of coin strikes, might have a pronounced effect on coin appearance.

     

    Thanks! I mentioned that comment because it was the simplest way to say what I needed to get across to the readers without confusion. Of course, 300 coins could cause die failure quite easily. However, since we had the same die pair paired up later and the reverse showed significantly less die wear, I could conclude that it had to have been used at some other point individually from the #45 reverse. If this hadn't happened, then the dies would have shown a very similar degree of wear, which does not appear to be the case. 

  13. On 11/28/2022 at 11:15 PM, GoldFinger1969 said:

    Question....if you use a super-fine polish that removes microscopic materials invisible to the naked eye...combined with a much nicer Cameo appearance...couldn't you end up with a much nicer-looking coin that only under magnification can you see loss of detail ?

    I think this was the conclusion we reached - that while the coins may be much more attractive, and therefore desirable, they still have less detail than the circulation coins. As you said, it could be invisible to the naked eye.

  14. On 11/28/2022 at 2:51 PM, RWB said:

    Grinding refers to the base of the die shank, not the face. The purpose was to get a good fit in the medal press. That one technician succeeded indicates different levels of skill.

    Polishing always removes material, therefore a polished die can never, in theory, have as much detail as an unpolished die. In a practical sense, there are multiple variables that could affect visible detail and us ordinary folk do not have the discriminatory training to see the differences.

    I see, this makes much more sense now. Thanks for clarifying!