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<p>[QUOTE=&quot;Marote, post: 9982243, member: 84568&quot;]Thanks. I already knew about this site, but as I thought it had both marks, the site wasn&#039;t of much help&nbsp; as it doesn&#039;t mention anything about the use of various marks together. </p><p>But, that doubt can be ignored, as I took another look at the marks just now, with better light (despite the cloudy and rainy day...), and it&#039;s now clear that the second mark is a 4. I assume that&#039;s the &quot;thickness&quot; of the plating (4 microns)[/QUOTE]</p><p><br /></p>

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