The serial number for Tibor, Tibor QC, Tibor Spey and Billy Pate reels is located on the side of the reel frame next to the reel stand. The serial number for the Tibor Signature Series is located under the nameplate at the top of the reel frame. The serial number generally consists of a letter and two or three numbers (ex. C456). On some older model Billy Pate reels, the serial number may be on the face of the reel and may only be two or three numbers. Please note: Tibor Light reels do not have serial numbers.