HK-299a R10 Louisiana Purchase Expo Official Souvenir SCD in Gold

Zoins

I was reading RYK's Brief Silver Dollar Coin Show Report and got interested in learning more about the Louisiana Purchase SCD after @RYK showed off his newp.

HK mentions that only one was struck in gold (HK-299a) according to the January 1911 issue of "The Numismatist," page 5. Is the current owner and any sale history known for that piece?

Here's one in silver for reference:

Zoins

Thanks to the Newman Numismatic Portal, HathiTrust and Google, old issues of The Numismatist are now digitized. Here's the note on the gold version of this medal, HK-299a.

Looks like this is pedigreed to: George H. Webber (commissioned piece) and H. O. Granberg of Oshkosh, Wisconsin.

Of note, H.O. Granberg was chairman of the Board of Governors of the American Numismatic Association.

It would be great to not only see the medal, but also the original note that came with it from the U.S. Mint!

Ref: https://nnp.wustl.edu/library/book/512669

Here are a couple of candidates for this George H. Webber:

1. George H. Webber (?-1930): https://www.nytimes.com/1930/04/16/archives/george-h-webber-secretary-of-bliss-dallett-co-dies-at-57.html
2. George H. Webber (1879-1925): https://www.findagrave.com/memorial/146142509/george-h.-webber

Zoins

It's also worth noting the Mint Exhibit official that wrote the letter is H.J. Slaker. It looks like he worked at the Assay Office in New York.

H.J. Slaker wrote the following article in The Scientific American for August 23, 1913

Buying and Selling Silver and Gold: The Scientific Side of the Assay Office at New York

https://www.scientificamerican.com/article/buying-and-selling-silver-and-gold/

https://www.jstor.org/stable/26020186

Here's a thread for this article:

https://forums.collectors.com/discussion/1089539/1913-the-scientific-side-of-the-assay-office-at-new-york-buying-and-selling-silver-and-gold#latest

He may also be Harrison Joseph Slaker of The Cove, Ossining, Westchester, New York:

Ref: https://www.ancestry.com/1940-census/usa/New-York/Harrison-J-Slaker_cljgc

Ref: https://ancestors.familysearch.org/en/94PV-F3J/harrison-joseph-slaker-1875-1954

FamilySearch.org said:
Harrison Joseph Slaker
3 May 1875–23 May 1954 • 94PV-F3J

Brief Life History of Harrison Joseph

When Harrison Joseph Slaker was born on 3 May 1875, in Aurora, Kane, Illinois, United States, his father, Valentin Ochsenschläger, was 41 and his mother, Anna L. Sedgwick, was 37. He married Eleanor Rosannah Kimball on 14 June 1906, in Northampton, Hampshire, Massachusetts, United States. They were the parents of at least 3 daughters. He lived in Cheltenham Township, Montgomery, Pennsylvania, United States in 1910 and Ossining, Ossining, Westchester, New York, United States for about 25 years. He died on 23 May 1954, in Concord, Merrimack, New Hampshire, United States, at the age of 79, and was buried in Baptist Burial Ground, Center Sandwich, Sandwich, Carroll, New Hampshire, United States.

Zoins

H.O. Granberg's collection was cataloged by Max Mehl. I wonder if this piece is in the catalog?

Collection of United States Coins of Mr. H. O. Granberg, Oshkosh, Wisconsin: To Be Sold at Auction Monday, July 14, 1913

The catalog is available on Amazon:

https://www.amazon.com/Collection-United-Granberg-Oshkosh-Wisconsin/dp/1528015452

Zoins

What's interesting is that we have more info on the gold pieces in the new book by Jeff @SoCalledGuy and Bill @Bsktmkr. Along with the statement from H.J. Slacker above, we have:

1. a newspaper clipping from the March 31, 1903 Salt Lake Tribute stating that the State of Colorado was going to provide gold for 3 gold strikes to be struck during the expo's dedicatory exercises, going to to Teddy Roosevelt, French President Emile Loubet, and David R. Francis President of the St. Louis Purchase Exposition.
2. additional information in the new book that indicates 11 gold pieces were struck.
3. statement above Harrison Joseph Slaker that only 1 gold piece was struck during the exposition

So, did H.J. Slacker get his information wrong? Or were the 10 gold pieces struck before or after the fair?

Has anyone seen a gold specimen?