Wow, what a killer guitar. These differ from the more famous 335 in several ways. There is no center block and is a full hollow thinline body, and they’re only p-90 pickups in them. The neck is also joined at the body at the 16th fret on this early model instead of the 19th fret like the 335 and newer 330’s. The model number stands for ES(Electric Spanish) 330 TD(Thinline Dual) pickup.