Hagstrom "world's fastest playing neck" 1966 guitar catalog, page 5. This page details the full Hagstrom bass range circa early 1966. Models covered are the quite basic FB, the intermediate F-400 and the professional quality Coronado IV. These bases were quite different in price, materials and hardware, but all had certain features in common.
The FB (like the F-11 shown on page 3) was a simple plywood body, with a painted acrylic 'cover' - the body itself is not finished. The F-400 had a solid birch body, with a standard polyester finish. Stylistically these two models are quite similar, broadly Fender-esque, though with a shorter scale than the Precision. All three basses pictured have two pickups, one master volume, and a series of two way switches: an on/off for each pickup, and two tone controls.
The Coronado bass pictured is equipped with bi-sonic pickups, though these were in the process of being phased out. By the time of the next Merson Hagstrom catalog later in 1966, the Coronado had new small single coil units - see page 9 of the Hagstrom guitars and basses move people catalog.
These basses were listed with prices of $165, $195 and $299.50 respectively. The F-400 was also available as a left-handed instrument, priced at $20 more than the right handed model, at $215.