Knife man,
I definetely agree that you would do good to disregard the picture in a catalogue. The best way to know what you are getting os to ask the seller questions. I can say that the older ones had ATS-34 either etched or engraved out towards the chamfer of the blade. The engraved ones are fairly rare though.
Hope this helps,
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Joe Houser
Director of Consumer relations
Buck Collectors club Administrator and member #123