Also from Flyguitars:
Gibson Grabber bass chronology
1973-74 Model introduction - maple body, only wine red or ebony finishes available. However only 1 instrument shipped in 1973, and 219 in 1974 - see the Grabber shipping totals). However a Gibson letter to dealers from late 1975 remarks on "the successful introduction of the Grabber Bass in January of 1975".
1975 The G1 was well received at the 1975 NAMM trade show alongside the G-3. Peak year for Grabber production, 2637 instruments shipped. Natural Satin finish also now available, these guitars having an alder body and maple neck.
1976 White finish introduced.
1977 Walnut and Maple Gloss finishes introduced. Maple Gloss is simply clearcoat over a maple body. Grabbers were available in maple and alder.
1982 Candy Apple Red and Metallic Blue finishes available.
1984 Model discontinued, final Grabber shipped.