It's a matter of a repair.
Some cue makers will authorize somebody else to produce their logo for repairs.
Frey is, of course, the perfect person to do so for Scruggs.
As was already said, Frey probably remembered the cue and knew it originally had a logo. That's an assumption, of course.
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I think I understand the guy's position about authenticating in the Balabushka/Tascarella thread a little better now.