upsetting

  1. Pete Apple
    Thread

    A REVIEW OF DIE CURVATURE AT THE US MINT

    A REVIEW OF DIE CURVATURE AT THE US MINT SYNOPSIS Throughout a significant portion of the history of coinage die design at the US Mint, the die...
    Thread by: Pete Apple, Dec 2, 2025, 8 replies, in forum: Error Coins
  2. Sunbird
    Thread

    Upset milling medallions and other coin-like objects

    Hi all – I'm suddenly fascinated by lathes, coining presses, and other machine tools. I feel like I completely missed out on a major technological...
    Thread by: Sunbird, Apr 22, 2022, 2 replies, in forum: Coin Chat
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