This cover was the same basic design and used the same pressed plate construction as the longer, taller (but slightly narrower) EB/Les Paul/Ripper/Thunderbird cover. It was first fitted to the SB300/400 in 1971 (but not the SB350/450) and later to the Grabber and G3. These were all models with budget bridge units; this cover will not work with the standard two point and three point bridges most widely fitted to Gibson bass guitars at this time.
Just like the aforementioned larger cover, it was manufactured from pressed brass, but nickel-plated rather than chromed (actually a very few of the very earliest larger covers were also nickel-plated, those fitted to the first Thunderbirds, but these are very much the exception). Covers fitted to SB basses were typically etched with a pre-war style scripted Gibson logo, as seen below, and oriented the opposite way to the norm. Some very early examples of the Grabber also had a logo'd cover - see this early Grabber advertisement for example - but using a more standard early seventies Gibson logo. However, the overwhelming majority of Grabber/G3 basses were shipped with a plain cover.
Approximate dimensions Total length 114mm (94mm excluding tabs), mounting hole spacing 104mm, width 45mm, height 23mm. Plate thickness approx 1.3mm
Gibson part numbers 1971: 19423, 1977: 19422; 1980: 80076
Some basses fitted with this cover
List of Gibson bass guitar bridges
