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awqstudy [10/04/2023 16:47 UTC] Tanner Scott created |
awqstudy [05/06/2024 03:18 UTC] (current) Tanner Scott |
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======American Women Quarters Doubling Study====== | ======American Women Quarters Doubling Study====== | ||
- | ====Explanation==== | + | =====Introduction===== |
If you have been looking at newer coins for doubled dies you have probably noticed an explosion in the number of hub doubling varieties on US coins since 2022. Some are even of classes that we thought no longer possible in the single-squeeze era (Class II/VI: [[http:// | If you have been looking at newer coins for doubled dies you have probably noticed an explosion in the number of hub doubling varieties on US coins since 2022. Some are even of classes that we thought no longer possible in the single-squeeze era (Class II/VI: [[http:// | ||
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For those two reasons (unexpected and unexplained resurgence of certain classes of doubled dies and an abundance of common doubling likely attributable to earlier in the die making process), there needs to be careful study and consideration for any and all doubling before we can confidently attribute them. | For those two reasons (unexpected and unexplained resurgence of certain classes of doubled dies and an abundance of common doubling likely attributable to earlier in the die making process), there needs to be careful study and consideration for any and all doubling before we can confidently attribute them. | ||
- | I hope here to publish my current observations so that others can search for more examples to support or rebuke | + | I hope here to publish my current observations so that others can search for more examples to support or refute |
- | Do not take any information here to be fact just yet! But please help confirm or rebuke | + | Do not take any information here to be fact just yet! I'm still working out the details on a few things and am still weighing which dies are listable or not. But please help confirm or refute |
- | ====Possible Doubled Master Hubs / Master Dies / Working Hubs==== | + | -Tanner Scott tannerpscott@gmail.com |
- | ===#1=== | + | ---- |
+ | |||
+ | =====Explanation===== | ||
+ | |||
+ | I have two possible explanations for the change in frequency and appearance of the 2022-present doubled dies: | ||
+ | - Relaxation of QC, less concern for the creation of doubled dies. | ||
+ | - Experimentation with die curvature, switching from spherical to exponential curve could(?) affect how a die slips (and creates doubled dies) during hubbing. [[https:// | ||
+ | |||
+ | ---- | ||
+ | |||
+ | =====Possible Doubled Master Hubs / Master Dies / Working Hubs===== | ||
+ | |||
+ | ====2022-P Doubled Master Die Obverse | ||
+ | {{:: | ||
+ | **Description: | ||
+ | **Known designs:** Angelou, Ride, Mankiller, and Wong (Takes up a significant portion, if not all?, of Angelou and Ride quarters. Uncommon on Mankiller and Wong. Expected but unconfirmed on Otero-Warren.) \\ | ||
+ | **Other Info:** N/A \\ | ||
+ | \\ | ||
+ | ====2022-P Doubled Working Hub Obverse #1==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Mankiller \\ | ||
+ | **Other Info:** N/A \\ | ||
+ | \\ | ||
+ | ====2022-P Doubled Working Hub Obverse #2==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Wong \\ | ||
+ | **Other Info:** Only have 1 example, which also has DDO. \\ | ||
+ | \\ | ||
+ | ====2023-P Doubled Working Hub Obverse #1==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Kanaka' | ||
+ | **Other Info:** More common than #2? [[http:// | ||
+ | \\ | ||
+ | ====2023-P Doubled Working Hub Obverse #2==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Kanaka' | ||
+ | **Other Info:** Less common than #1? \\ | ||
+ | \\ | ||
+ | ====2023-P Doubled Working Hub Obverse #3==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Kanaka' | ||
+ | **Other Info:** Rarest of the 3 Kanaka' | ||
+ | \\ | ||
+ | ====2022-P Angelou Doubled Master Die Reverse #1==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Other Info:** Doubling on MAYA ANGELOU is not visible in late hub/die states. \\ | ||
+ | \\ | ||
+ | ====2022-P Ride Doubled Master Die Reverse #1==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Ride \\ | ||
+ | **Other Info:** Typically very weak, may not visible in late hub/die states. \\ | ||
+ | \\ | ||
+ | ====2023-P Coleman Doubled Working Hub Reverse #1==== | ||
+ | {{: | ||
+ | **Description: | ||
+ | **Known designs:** Coleman \\ | ||
+ | **Other Info:** N/A \\ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | =====Design-By-Design Summary===== | ||
+ | |||
+ | ====2022 Maya Angelou==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2022 Doubled Master Die Obv #1 and 2022 Angelou Doubled Master Die Rev #1 \\ | ||
+ | **Known Doubled Dies:** 0x Obv, 5x Rev (2 only on [[http:// | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | \\ | ||
+ | ====2022 Sally Ride==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2022 Doubled Master Die Obv #1 and 2022 Ride Doubled Master Die Rev #1 \\ | ||
+ | **Known Doubled Dies:** 1x Obv, 7x Rev (4 only on [[http:// | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | \\ | ||
+ | ====2022 Wilma Mankiller==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2022 Doubled Master Die Obv #1 \\ | ||
+ | **Known Doubled Dies:** None known \\ | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | \\ | ||
+ | ====2022 Nina Otero-Warren==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** (2022 Doubled Master Die Obv #1 expected but unconfirmed.) \\ | ||
+ | **Known Doubled Dies:** 0x Obv, 2x Rev \\ | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** 0x Obv, 1x Rev (Few examples seen) \\ | ||
+ | {{: | ||
+ | \\ | ||
+ | ====2022 Anna May Wong==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2022 Doubled Master Die Obv #1 and 2022 Doubled Working Hub Obv #2 (I also suspect a doubled working hub reverse but more examples needed) \\ | ||
+ | **Known Doubled Dies:** 2x Obv (One major, I do not yet have permission to use photos here), 0x Rev \\ | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | |||
+ | ====2023 Bessie Coleman==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2023-P Coleman Doubled Working Hub Reverse #1 \\ | ||
+ | **Known Doubled Dies:** 6x Obv, 1x Rev \\ | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | |||
+ | ====2023 Edith Kanaka' | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2023 Doubled Working Hub Obverse #1, #2, and #3 \\ | ||
+ | **Known Doubled Dies:** 6x Obv (1 only on [[http:// | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | |||
+ | ====2023 Eleanor Roosevelt==== | ||
+ | **Philadelphia** \\ | ||
+ | **Known Master Die and Hub Issues:** 2023 Doubled Working Hub Obverse #1 and #2 \\ | ||
+ | **Known Doubled Dies:** 4x Obv, 9x Rev \\ | ||
+ | {{: | ||
+ | |||
+ | **Denver** \\ | ||
+ | **Known Master Die and Hub Issues:** None known (Few examples seen) \\ | ||
+ | **Known Doubled Dies:** None known (Few examples seen) \\ | ||
+ | |||
+ | ====Others==== | ||
+ | |||
+ | I haven' | ||
+ | |||
+ | 2024-P Pauli Murray: 1 DDO known (Only on [[http:// |