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<p>[QUOTE="dltsrq, post: 8171234, member: 75482"]A caveat to consider. When taking reference numbers from a source other than the reference itself, it can be difficult to know what criteria the author of the original reference used to distinguish one number from another. In one case, a very minor difference may result in different numbers and in another, significant varieties may be subsumed under a single number. In the case of collection catalogues such as the BM series, there may be a run of virtually identical duplicates, each given a separate number, while important types may be missing altogether. In addition, there is always the possibility that second-hand references simply have it wrong. A listing scraped from eBay, for example, is only as accurate as the eBayer who originally listed the item.[/QUOTE]</p><p><br /></p>
[QUOTE="dltsrq, post: 8171234, member: 75482"]A caveat to consider. When taking reference numbers from a source other than the reference itself, it can be difficult to know what criteria the author of the original reference used to distinguish one number from another. In one case, a very minor difference may result in different numbers and in another, significant varieties may be subsumed under a single number. In the case of collection catalogues such as the BM series, there may be a run of virtually identical duplicates, each given a separate number, while important types may be missing altogether. In addition, there is always the possibility that second-hand references simply have it wrong. A listing scraped from eBay, for example, is only as accurate as the eBayer who originally listed the item.[/QUOTE]
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