The Gibson ES-330 is a thinline hollowbody electric guitar

Electric guitar

An electric guitar is a guitar that uses the principle of direct electromagnetic induction to convert vibrations of its metal strings into electric audio signals. The signal generated by an electric guitar is too weak to drive a loudspeaker, so it is amplified before sending it to a loudspeaker...

 model produced by the Gibson Guitar Corporation

Gibson Guitar Corporation

The Gibson Guitar Corporation, formerly of Kalamazoo, Michigan and currently of Nashville, Tennessee, manufactures guitars and other instruments which sell under a variety of brand names...

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Though similar in appearance to the popular Gibson ES-335

Gibson ES-335

The Gibson ES-335 is the world's first commercial thinline arched-top semi-acoustic electric guitar. Released by the Gibson Guitar Corporation as part of its ES series in 1958, it is neither hollow nor solid; instead, a solid wood block runs through the center of its body...

 semi-hollow guitar, the ES-330 was a fairly different guitar in construction and sound. While the 335 is a semi-hollow guitar (that is, the central part of the guitar body was a solid block while the wings of the guitar were hollow), the 330 was a fully hollow thinline guitar.