Hi Matt - Welcome!
Looks to be a grade 0 but the photos are pretty fuzzy so we can't really see and of the critical detail.
The T within the upper and lower crescents is the stamp for Twist Steel barrels.
The 3 indicates that the pre-struck barrel weight was 3 lbs., and 14 oz. as indicated by the superscript 14 to the right of the 3.
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