1955 P Lincoln Wheat With Double Rim

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Author	Replies: 4 / Views: 1,148
SF11Dude Pillar of the Community United States 746 Posts	Posted 12/30/2016 12:39 pm Any idea what causes this double rim? Report this Post to the Staff

Halo1st Pillar of the Community United States 2775 Posts	Posted 12/30/2016 1:38 pm Appears the proto rim did not fully strike up. Does the rest of the coin rim appear normal or look the same? Thanks, Doug. First glance seem to show it sloping down. Second time I look I have to ask is any misalignment involved? Edited by Halo1st 12/30/2016 1:44 pm Report this Post to the Staff
SF11Dude Pillar of the Community United States 746 Posts	Posted 12/30/2016 2:36 pm Thanks Halo1st, from the naked eye it looks to be moving toward the 7 o'clock position (thinnest) but from the camera eye, it is at the 4 o'clock position. (obverse photos of date 4 o'clock and shoulder 7 o'clock) I have attached reverse photos of the rim and a rim profile which shows the rim is lowered on both sides of the coin. Report this Post to the Staff
Halo1st Pillar of the Community United States 2775 Posts	Posted 12/30/2016 3:31 pm Seems to be some remaining beveled edge from the proto rim. US coin blanks are put through an upset process which forms the proto rim then referred to a planchet. This a. slightly reduces the diameter to aid feeding into the coining chamber. b. helps clean off burrs from the blanking process. c. creates the a raise beveled edge or proto rim. This aids in rim creation using lower strike pressure. Common to find. Thanks, Doug. Report this Post to the Staff
SF11Dude Pillar of the Community United States 746 Posts	Posted 12/30/2016 3:33 pm Thanks for the education about the process and what causes this. Report this Post to the Staff
	Replies: 4 / Views: 1,148

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