Questionable eBay listing

Back image looks to be from a 1934C, based on plate number, but face image is 1934 and serial number too low for mules.
Is this a mistake or something more sinister ???
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Back image looks to be from a 1934C, based on plate number, but face image is 1934 and serial number too low for mules.
Is this a mistake or something more sinister ???