The following discription is courtesy of Heritage Auctions catalogers:
1852 $50 RE Humbert Fifty Dollar, Reeded Edge, 887 Thous., AU50 PCGS. K-11, R.5. Kagin-11 is the final Humbert fifty dollar die variety. Moffat & Co., the private firm operating the San Francisco Assay Office, reorganized in 1852. Respected founder John Little Moffat was out, and the company was renamed Curtis, Perry & Ward, after its remaining partners. Beginning with Kagin-12, the stamped ingots from the mint would replace Humbert's name and title with UNITED STATES ASSAY OFFICE OF GOLD. The rare K-11 is thus the end of an era that had begun just one year earlier, when the facility first opened. The present partly lustrous caramel-gold representative is nicer than most examples, since luster remains on the wings, and the only consequential mark is a small obverse rim knock at 12 o'clock. Listed on page 403 of the 2021 Guide Book. Population: 5 in 50, 10 finer (2/21). See more pictures here... https://www.youtube.com/shorts/KO06HEnvNNY
