Thank you for viewing. This is the Willies Yu Tamaki signature model. I once bought various items from his signature series, but I am selling this one because I purchased something else that suits me better. Inner diameter is 25.7mm (about 4.5G in backbore terms) and the throat is 7.2mm. There is some wear and tear (scratches on the shank, etc.), but there are no dents or major scratches, so I think there will be no problem playing it. I don't think the plating has worn off much either. Since there is no box, I will ship it wrapped in cushioning material.