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$20 2017 Face plate vs back plate number
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<p>[QUOTE="Numbers, post: 3547372, member: 11668"]They are not. As of a couple years ago (and I think it's still correct today), the BEP has eight of the new SOI presses and fourteen of the older I-10 presses. Washington has four of each; FW has the rest.</p><p><br /></p><p>I'm not absolutely sure what all's been printed on which press types at various times. Certainly all the 50-subject $1's are SOI products, because the older presses can't handle the larger sheets. Many $20's have been SOI but lately they seem to be mostly I-10. The $5's were all SOI for a while but I'm not sure about the latest batches. I don't think the SOI presses have produced any $2, $10, $50, or $100 notes, but there might have been some I'm forgetting.</p><p><br /></p><p>(If you get a quantity of new consecutive notes, you can identify the press type by looking at the rotation of plate numbers. The SOI presses use three different plates in rotation; the I-10 presses use four different plates in rotation.)</p><p><br /></p><p>As to the original topic of this thread: I have no clue what's going on with the $20 BP numbers. Historically, the FP numbers have generally run a bit ahead of the BP numbers, because the BPs print on blank flat paper but the FPs print on paper that's already covered in ridges from the back printing, which makes the FPs wear out just a bit faster. But the recent $20 series have had BPs running *far* ahead of FPs, for no apparent reason.... I doubt that there's a simple explanation involving the SOI presses, because the SOI $1's don't seem to exhibit the same pattern.[/QUOTE]</p><p><br /></p>
[QUOTE="Numbers, post: 3547372, member: 11668"]They are not. As of a couple years ago (and I think it's still correct today), the BEP has eight of the new SOI presses and fourteen of the older I-10 presses. Washington has four of each; FW has the rest. I'm not absolutely sure what all's been printed on which press types at various times. Certainly all the 50-subject $1's are SOI products, because the older presses can't handle the larger sheets. Many $20's have been SOI but lately they seem to be mostly I-10. The $5's were all SOI for a while but I'm not sure about the latest batches. I don't think the SOI presses have produced any $2, $10, $50, or $100 notes, but there might have been some I'm forgetting. (If you get a quantity of new consecutive notes, you can identify the press type by looking at the rotation of plate numbers. The SOI presses use three different plates in rotation; the I-10 presses use four different plates in rotation.) As to the original topic of this thread: I have no clue what's going on with the $20 BP numbers. Historically, the FP numbers have generally run a bit ahead of the BP numbers, because the BPs print on blank flat paper but the FPs print on paper that's already covered in ridges from the back printing, which makes the FPs wear out just a bit faster. But the recent $20 series have had BPs running *far* ahead of FPs, for no apparent reason.... I doubt that there's a simple explanation involving the SOI presses, because the SOI $1's don't seem to exhibit the same pattern.[/QUOTE]
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$20 2017 Face plate vs back plate number
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