Tweet
Doubled dies: Class 1
(rotated hub doubling)
(Adapted from my ErrorScope articles.)
Class I Hub Doubling is typically easy to conceptualize and diagnose. It emerges from two or more separate hubbings. Prior to the second hubbing, the working hub or the working die rotates in relation to the first hubbing at or near the center point of the die. Class I doubled dies are listed as showing a clockwise (CW) or counter-clockwise (CCW) rotation like their Pivoted Class V cousins. The direction is determined by which hubbing is weakest or lightest towards the clearest and most complete. This is usually thought of as the second hubbing (which tends to be deepest), but it would be impossible to objectively prove which came first.
Doubling is typically rounded, with notching, sometimes showing separation lines, when the impressions are closer in proximity (or because of die wear) extra thickness may only be visible.
Below is the King of Doubled Dies, the 1955 DDO-001 and next to it an overlay diagram has a similar counter-clockwise rotation. Notice how the spread is equally deep for all devices and increases the farther out you go from the center of the coin. DDO refers to a doubled die that affects the obverse face of a coin. DDR refers to a doubled die that affects the reverse face of a coin.
(rotated hub doubling)
(Adapted from my ErrorScope articles.)
Class I Hub Doubling is typically easy to conceptualize and diagnose. It emerges from two or more separate hubbings. Prior to the second hubbing, the working hub or the working die rotates in relation to the first hubbing at or near the center point of the die. Class I doubled dies are listed as showing a clockwise (CW) or counter-clockwise (CCW) rotation like their Pivoted Class V cousins. The direction is determined by which hubbing is weakest or lightest towards the clearest and most complete. This is usually thought of as the second hubbing (which tends to be deepest), but it would be impossible to objectively prove which came first.
Doubling is typically rounded, with notching, sometimes showing separation lines, when the impressions are closer in proximity (or because of die wear) extra thickness may only be visible.
Below is the King of Doubled Dies, the 1955 DDO-001 and next to it an overlay diagram has a similar counter-clockwise rotation. Notice how the spread is equally deep for all devices and increases the farther out you go from the center of the coin. DDO refers to a doubled die that affects the obverse face of a coin. DDR refers to a doubled die that affects the reverse face of a coin.
Comment