Omega Cards

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I'm looking to buy an Omega Seamaster 2254.50. From the photos I was given, there appears to be an International card and what appears to be a Chronometer card. From what I can see, the cards have different numbers. The Watch No. on the International card looks like it starts with a 1 on the Chronometer card the Watch No. starts with an 8. Would these two numbers be different?

Thanks
 
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The serial number on both the warranty and chronometer card should be the same.