Some basses fitted with this bridge
This bass bridge was fitted to Hagstrom Coronado, Guild Jetstar and Guild Starfire bass guitars in the mid-1960s, before being replaced with a very similar lyre-shaped version at the end of the decade. This bridge consists a solid brass baseplate, with four sliding sliders, each holding a saddle. Saddles were initially bakelite, and later rosewood. The bridge was strong, effective, easy to adjust, and simple to install.
The bridge itself is held in place with the two screws closest to the tail end of the bridge. Intonation adjustments are made by unloosening one of the four small locking screws, and manually moving the saddle before re-tightening. The saddles are not individually height adjustable, but the baseplate can be raised, lowered or tilted by adjusting the two larger screws close to the saddles. These press into screws in the guitar's body itself; rather than turning into the wood, they push the baseplate upwards. Look at the image of the bass body with bridge unit removed.
List of vintage Hagstrom parts