I don't own a Jaguar, but from the ones I've seen on ebay, the bridge looks the same as the Precision and Jazz. Therefore I would imagine that either the later p ashtray would work and even the early p ashtray/telecaster bass ashtray would fit. And, if the guys' j tray in the youtube fit, then it makes sense that a standard P tray would fit as well. To be sure, you should ask someone on ebay that's selling them for specific inside measurements.