Bore: C (Standard) Material: N (Soft German Silver - Standard) Plating: Silver Plated Length: 1 (442Hz) Metal Thickness: 0.6mm (Standard) https://heckel.de/wp-content/uploads/2018/08/Wilhelm-Heckel-GmbH-S-Boegen.pdf There are two points to note: * There is a slight dent, as shown in the third photo. * The curve of the bocal is slightly flatter than usual. It doesn't seem to have any distortion. Although there are scratches, it is moderate and I think it is an individual that vibrates easily and is easy to play.