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triple-clipped LMC?
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KurtS
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PostPosted: Thu Dec 11, 2008 7:47 pm Reply with quote

Here's a coin someone found while roll searching. Does it look legit to you? I understand it's not a terribly detailed photo, so if there isn't enough to see, let me know--thanks!

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eagames
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PostPosted: Thu Dec 11, 2008 8:18 pm Reply with quote

Looks OK to me.

I see 2 areas of Blakesley effect, one is normal but the other isn't exactly opposite to the clips.

My guess is Blakesley is not as predictable on big clips or multiple clips.
Maybe as it goes through the upset rollers when it hits the area with both clips aligned with rollers it stops getting upset instead of only showing Blakesley opposite of the clip as it would with a single small clip.

I'm not an error expert, that's my thought. Wink

See what others think.

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Rhubarb
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PostPosted: Thu Dec 11, 2008 8:39 pm Reply with quote

The Radius of the 2 clips seem to be the same. The 3rd to the SE is different.

I could use a press to make the same Radius. If one knows the Circumference of the Dies it could easily be determined.

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CoinboyJay
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PostPosted: Thu Dec 11, 2008 9:37 pm Reply with quote

I knew that a genuine "clipped" coin had weakness opposite the clip but I had never heard the term Blakesley effect. So, I did what everyone does nowdays, I googled it!!
The SE clip looks like maybe a strait clip and there is some good info at the site http://www.triton.vg/StraightClip.html I found in my google search. I tells how to determine if a strait clip is genuine and weather it came from the end or the side of the metal strip the blanks are punched out of.
Very interesting AND I learned something tonight!! Thanks for posting that coin pic.
Give that link a quick read.

JAY
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eagames
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PostPosted: Thu Dec 11, 2008 9:58 pm Reply with quote

This one has a good desc of the Blakesley effect:


http://koinpro.tripod.com/Articles/CurvedClipDiagnostics.htm

It's the weak rim on the opposing side of the coin. They run blank planchets between rollers to "upset" the rim before striking the coins. If a planchet has a clip then as it goes between the rollers the missing section makes the rollers not press as hard in the area opposite of the clip creating the weakly upset rim on the opposite side of the coin. That merc on the link shows it best. Smile

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Dick
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PostPosted: Thu Dec 11, 2008 10:07 pm Reply with quote

The two clips at 11, and 5, seem to off-set each other, and the other is quite cleasr. The rim at 12 oclock seems to have been "impacted, by the up-set mill, after moving by the clipped area.. Again at 11 oclock, the same, but lessor degree of impact is notable. Going on around, the Blakesly effect id noticed, and qwhen arriving to the six oclock position, a nearly normal rim is produced. Or is it my eyes?
I noticed on the link, the second edge shot also indicated which side the "cookie-cutter" was on, by the sort of 'hanging look on the edge. that is to say the 'cutter was on the lower side, (in the picture).
Dick

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