Joined: Feb 2012
Posts: 19,344
Likes: 5,461
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
I suspect the mark is a superficial scratch and not the start of a crack. But none of us here in the interweb world will be able to tell for sure without a better ability to examine, as the fork being in hand.
One could return the fork to the seller/maker for their assessment.
Me I would ride it and routinely check it out for growth. Andy
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AndrewRStewart