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<p>[QUOTE=&quot;Conder101, post: 333723, member: 66&quot;]Weight is not going to be sufficent to tell a 40% silver quarter from a clad.&nbsp; The weight difference is only .08 grams and the weight tolerance allowance is +/- .22 grams.&nbsp; So the weight can vary by almost three times the difference in the weights.&nbsp; You would have to do a specific gravity test (8.92 for clad, 9.53 for the 40% silver.)</p><p><br /></p><p>About the only way i could see this as being a 40% silver&nbsp; no mint mark bicentenial would be it it was one of the coins from the one or two display sets of coins that were made for display at a PR event kicking off the bicentennial coins.&nbsp; They had a couple of sets of proof coins on display at the events and collectors realized that they didn&#039;t have mintmarks on them.&nbsp; Supposedly after the event all of th display coins were distroyed, but one or two of the no mintmark proof Ike dollars did manage to get out.&nbsp; I&#039;ve never heard of any reports of the quarters and halves showing up.&nbsp; So if you REALLY believe this is a 40% silver, it really should be authenticated.[/QUOTE]</p><p><br /></p>

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