The Gibson Grabber uses standard long-scale strings
Rotosound RS88LD Trubass Bass Strings (Rotosound - Bass Strings - RS88LD - True Bass (Black Nylon))
Rotosound RS66LC Bass Strings Long Scale (RotoSound RS66LC Swing Bass - Stainless Steel)
D'Addario EXL170 Nickel Wound Bright Round Wound Electric Bass Strings (D'Addario Bass Strings Nickel Wound - Soft)
Fender 9120 Nylon Tapewound Bass Strings (Fender Nylon Tapewound - Long Scale - 34)
Fender 9050L Stainless Flatwound Bass Strings (Fender - Stainless Bass Flatwound - Long Scale - 34 - Light )
Rotosound RS66LD Bass Strings Long Scale Strings (RotoSound Swing Bass RS66LD - Stainless Steel)
D'Addario EXL160 Regular Gauge Nickel Wound Electric Bass Strings (D'Addario Bass Nickel Wound Long Scale - Regular)
Rotosound RS77LD Jazz Bass Strings (Rotosound - Bass Strings - RS77LD - Jazz Bass)
D'Addario EXL220 XL Nickel Round Wound Super Light Bright Electric Bass Strings (D'Addario Bass Strings Nickel Wound Long Scale - Super Soft)
Thomastik-Infeld JF344 Jazz Flatwound Long Scale 4-String Bass Strings (Thomastik-Infeld JF344 Jazz Flatwound Long Scale 4-String Bass Strings)

The arrow shaped headstock of the Grabber
Between 1975 and 1977, many Gibsons had an eight digit serial number, a transfer rather than a stamped number. The first two digits signify the year. 99- 1975, 00- 1976, 06-1977. These instruments also had the model name.
Gibson Grabber Sound Clips

These sound clips are recorded directly into a mobilepre preamp. Recorded with flat wound strings.