Saturday, May 30, 2020

George Floyd, the Minnesota man who died last week during a botched arrest, was been accused by some reporters as being wanted for the forgery of a $20 bill.

"Forgery" would mean he made it himself. He was accused of passing a forgery, knowingly or unknowingly. Most people don't even look at their change, they just spend it at the next place.

According to August 2019 article, the U.S. Secret Service is working with [Minnesota] retailers to stop the flow of counterfeit money coming into the Twin Cities. If cashiers, who work with money all day long, need education to spot fake notes why should anyone expect that a regular citizen would recognize it? I have the skills to detect counterfeit currency, but since the pandemic I have been touching the bills I receive as little as possible. https://minnesota.cbslocal.com/2019/08/13/trying-to-be-very-aware-twin-cities-retailers-on-lookout-for-counterfeit-cash/

Here is a January story on $900,000 of counterfeit US currency seized by Customs and Border Patrol in Minnsota. https://www.kare11.com/article/news/local/counterfeit-bills-seized-at-minnesota-border-international-falls-china/89-920a8623-b78c-4d52-a735-6eb913ffd98d

Friday, May 29, 2020

Kharosthi coin inscription, Unicode

The coin:

Indo-Greek, Menander I (165-135 BC), drachm 2.34g 16mm

The obverse Greek inscription: ΒΑΣΙΛΕΩΣ ΣΩΤΗΡΟΣ ΜΕΝΑΝΔΡΟΥ (Basileos Soteros Menandrou; of King Menander, the Savior)

The reverse Kharosthi inscription: 𐨨𐨂𐨱𐨪𐨗𐨯 𐨟𐨟𐨪𐨯 𐨨𐨅​𐨣𐨪𐨯

The reverse inscription usually appears in coin catalogs as Maharajasa tratarasa Menamdrasa; “The Savior King Menander”. The Kharosthi might appear in a table at the end. It's real text here. (You may need a font to see it.) You can cut and paste it to other documents.

One of my hobbies is trying to put coin inscriptions into computer format. Hopefully I came close. Step one was glancing at the Unicode Kharoṣṭhī proposal, especially the table at the end.

This is what I came up with:

Ma-u-ha-ra-ja-sa 𐨨𐨂𐨱𐨪𐨗𐨯 𐨨𐨂𐨱𐨪𐨗𐨯
ta-ta-ra-sa 𐨟𐨟𐨪𐨯 𐨟𐨟𐨪𐨯
Ma-e-na-d-ra-sa 𐨨𐨅​𐨣𐨪𐨯 (using a zero-width space to help position; using ra instead of the compound dr) 𐨨𐨅​𐨣𐨪𐨯

Wednesday, May 20, 2020

Deep dive into Ex-Numis provenance search

A Gift for Polydektes blog is excited to announce that Dr. Jonas Emmanuel Flueck will be presenting a detailed look at the ancient coin provenance searching software Ex-Numis via Zoom later this month.

I blogged about this in in 2016.

The presentation will be Saturday May 30th 1pm EDT. To attend please RSVP Ed Snible. This presentation is hosted by the Bronx Coin Club and the Ancient Numismatic Society of Washington DC.

Dr. Jonas Emmanuel Flueck created a computer system that uses digital image recognition to match coin images to an extensive database of sales catalogs. Five years ago he founded Ex-Numis, a provenance rediscovery service for ancient coin collectors and dealers.

Dr. Flueck will tell us about the importance of provenance for both legal and scholarly reasons, his technology and database of almost one million ancient coins, and what he has learned about provenance in today’s ancient coin market.

Dr. Jonas Emmanuel Flueck is the executive director of the auction house “Lugdunum GmbH” (Switzerland); a former treasurer at the IAPN; the general secretary of the Association of Swiss Professional Numismatists; and the founder of Ex-Numis.

Tuesday, March 31, 2020

Numismatic titles in archive.org's National Emergency Library

On March 24, 2020 archive.org released for unlimited borrowing the 1.4 million book titles they call the National Emergency Library.

They believe the global pandemic justifies their action. (They give their legal and moral justification here.)

The National Emergency Library is not just medical books. It is everything they have. For the duration of the emergency you can download all kinds of amazing things. Here is a list of their numismatic holdings by decade. It includes some very rare auction catalogs and club journals.

I encourage everyone looking for an at-home project to consider finishing your own numismatic works and prepare them for publication. Stay home. Use this library for research during the pandemic.

Monday, March 09, 2020

Older CNG catalogs

The auction house Classical Numismatic Group has an excellent web site with a good search engine that can be used to study over 300,000 coins and related objects that have appeared in their sales.

The searchable database begins with sale 60 (22 May 2002).

CNG sold many important coins before their 60th sale. Some of their old catalogs are for sale at CNG's own catalog site. They can also sometimes be found in book auctions. A brief index of the focus of each catalog can be found on Warren Esty's site.

Many people don't know that catalogs for sales 1-56 have been uploaded as searchable PDF files and are freely downloadable. I have created a simple list of direct links to the catalogs.

  1. CNA I
  2. CNA II
  3. CNA III
  4. CNA IV
  5. CNA V
  6. CNA VI
  7. CNA VII
  8. CNA VIII
  9. CNA IX
  10. CNA X
  11. CNA XI
  12. CNA XII
  13. CNA XIII
  14. CNA XIV
  15. CNA XV
  16. CNA XVI
  17. CNA XVII
  18. CNA XVIII
  19. CNA XIX
  20. CNA XX
  21. CNA XXI
  22. CNG XXII
  23. CNG XXIII
  24. CNG XXIV
  25. CNG XXV
  26. CNG XXVI
  27. CNG XXVII
  28. CNG XXVIII
  29. CNG XXIX
  30. CNG XXX
  31. CNG XXXI
  32. CNG XXXII
  33. CNG XXXIII
  34. CNG XXXIV
  35. CNG 35
  36. CNG 36
  37. CNG 37
  38. CNG 38
  39. CNG 39
  40. CNG 40
  41. CNG 41
  42. CNG 41
  43. CNG 43 September 24, 1997
  44. 44 was Triton I. CNG Triton I
  45. CNG 45 March 18, 1998
  46. CNG 46
  47. CNG 47 September 16, 1998
  48. 48 was Triton II. CNG Triton II
  49. CNG 49 March 17, 1999
  50. CNG 50
  51. CNG 51 September 15, 1999
  52. 52 was Triton III. CNG Triton III
  53. CNG 53 March 15, 2000
  54. CNG 54
  55. CNG 55
  56. 56 was Triton IV. CNG Triton IV part 1 and CNG Triton IV part 2

Saturday, February 15, 2020

Wearing down a replica to make it appear genuine

The 19th century forger Becker discovered he could make his product seem genuine by applying artificial wear.

It seems some modern forgers have relearned his trick. Antiquanova.com sells nice replica Neapolis staters for 45 euro in fine silver and 6 euro in tin.

A UK-based eBay seller has the following coin listed with 6 days remaining. Six bidders have worked it up to £26.00.

Wednesday, January 15, 2020

NFC chips coming to slabs

CoinWeek reported on December 27 that PCGS will partner with HID Global to begin embedding high security Near Field Communication (NFC) chip technology in slabs starting in early 2020. There will be apps for NFC-enabled smartphones to verify the slabs are authentic, and to display the information on the slab. Typically NFC readers need to be 4cm or closer to read the chips. It may be possible to read the chips from a few feet away using a giant circular antenna.