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<p>[QUOTE=&quot;19Lyds, post: 1981722, member: 15929&quot;]Whatever you paid, I&#039;ll double it. No. I&#039;ll QUINTUPLE it just to be able to own a 90% Silver Brown Box IKE since all the Brown Box IKE&#039;s are only 40% Silver Clad where the outer layer is 80% Silver/20% Copper and the core is 20% Silver and 80% Copper.</p><p><br /></p><p>As for 1974?</p><p><br /></p><p>My guess is in the rinse since the final rinse for these coins pretty much dictates what happens over the long run. For whatever reason, the rinse was even enough across the surface of the coin to cause some type of reaction with the black plastic housing the coin was in.</p><p><br /></p><p>1971-S 40% Proofs had a tendency to turn Blue while 1972-S 40% Proofs had a tendency to turn green. 1973-S went back to blue and the 1974-S&nbsp; coins just went to the moon.</p><p><br /></p><p>1974 has some beautifully target tones 40% Silver Proof coins, some fairly hazed up 40% Silver Proof Coins and then the standard run of the mill 40% Silver Proofs.</p><p><br /></p><p>[ATTACH=full]353428[/ATTACH]</p><p><br /></p><p>[ATTACH=full]353426[/ATTACH]</p><p><br /></p><p><br /></p><p>[ATTACH=full]353427[/ATTACH]</p><p><br /></p><p>[ATTACH=full]353429[/ATTACH]</p><p><br /></p><p>Of course, the downside to some of this toning is that PCGS will no longer designate the coins as Deep Cameo since the haze/toning kinda destroys the &quot;deep&quot; factor.</p><p><br /></p><p>1974 was an interesting year in that the &quot;S&quot; Mintmark punch broke early in production and was replaced with a different punch that actually had doubling.</p><p><br /></p><p>The mint marks are referred to as:</p><p><br /></p><p>MMS-1 (Scarce)</p><p>MMS-2a (Common)</p><p>MMS-2b (Rare)</p><p>MMS-2c (Common)</p><p><br /></p><p>They look like this:</p><p><br /></p><p>[ATTACH=full]353430[/ATTACH]</p><p><br /></p><p><br /></p><p>MMS-1 matches the Mint Mark on the 1973 and earlier coins.</p><p>MMS-2a has a little notch in the upper loop of the S</p><p>MMS-2b has the notch plus a serif split on the upper outside serif.</p><p>MMS-2c has the notch, the split and what appears to be doubling on the upper loop.</p><p><br /></p><p>MMS-2c had been referred to as an RPM but was later attributed as simple a doubled punch as the particular &quot;RPM&quot; feature, exists on literally all denominations of well struck 1975/1976 coins. As such, it simply could NOT be an actual RPM as much as a doubled mintmark punch. However, you can still find 1974-S 40% Silver Proof IKE Dollars slabbed as &quot;RPM&quot; or &quot;S/S&quot;.</p><p><br /></p><p>[ATTACH=full]353432[/ATTACH][/QUOTE]</p><p><br /></p>

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