Roger writes:

Feuchtwanger's 3-Cent Token Suggested by John Quincy Adams.

Here is the lot description from Heritage's 2023 May 22 Certified American Tokens & Medals US Coins Showcase Auction #60320,

. German silver, reeded edge. The 1837 Feuchtwanger three cent featuring an eagle on a rock is a valuable Guide Book variety, listed on page 427 of the 2023 edition. Two dies pairs are known, though HT-265 and HT-265A are so rare as to be noncollectible. Most examples of HT-263 are circulated, but the present lot is an attractive Mint State example. Nicely struck and unblemished with ample straw-gold luster. Hints of gray color correspond with minor alloy imperfections. From The Nassau Collection.

Here is additional information I located that might be of interest to your readers.

John Quincy Adams recorded a meeting with Feuchtwanger on Sept 12, 1837 in his personal diary. This points to the 3-cent variety being produced sometime after September 12, and at the direct suggestion of Adams.

[In the last sentence, Adams means that Feuchtwanger should propose his alloy for 2 or 3-cent coins and not for cents because that would keep the copper pieces in circulation. RWB]

Source: Massachusetts Historical Society. John Quincy Adams Diary, volume 33: September 12, 1837. Ref. 12. IV:30. Tuesday.

To read the complete lot description, see:
1837 3C Feuchtwanger Three Cent -- Cleaned -- NGC Details....(https://coins.ha.com/itm/hard-times-tokens/tokens-and-medals/1837-3c-feuchtwanger-three-cent-cleaned-ngc-details-unc-low-118-ht-263-w-ny-480-65j-re-r4-pcgs-/p/60320-11081.s)