Though not officially acknowledged by the US Mint as a design reference, the obverse of Peter Krider's 1881 Yorktown Surrender Centennial medal is considered by many students of the US commemorative series to have had a very
direct influence on Charles Barber
's design for the obverse of the 1900 Lafayette silver dollar. Both pieces feature conjoined portraits of Washington and Lafayette, with Washington in the foreground.
I've looked for a reasonable example of the Yorktown medal for a number of years while attending coin shows or reviewing catalogs of upcoming medal auctions. Several that I've encountered struck me as being aggressively over-priced and so did not make it into my collection.
Recently, however, I participated in a mail bid auction from a dealer specializing in tokens and medals and wound up winning the medal shown below for a very reasonable price; from the price I paid, it appears to me that the bidding on the medal was limited.
The medal shown is a white metal example, the medal is also available in copper, bronze and lead; white metal examples appear to be the least scarce based on my own experiences. The piece is just over 50mm in diameter and is 5mm at the rim; you can see in the images below (especially the obverse) that the medal is struck in fairly high-relief.
The reverse of the medal depicts British Lieutenant General Lord Cornwallis' surrender to General George Washington (on horseback).
I've included an image of the obverse of the 1900 Lafayette dollar below for comparison with the medal. I'll leave it to you to decide how much Barber "borrowed" from Krider!
Enjoy!1881 Yorktown Surrender Medal -- Obverse1881 Yorktown Surrender Medal -- Reverse1900 Lafayette Silver Dollar - Obverse