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Guild made some great playing and unique looking guitars in the 1970s. And the B-301 is one of them, the single pickup version of the Guild B302 bass - available in Sunburst, Cherry, Black, Walnut, Natural and White between 1977 and 1980. This first year example is in Black.
It has the standard construction for this model: 34" (long) scale, a mahogany body with a three-piece set (glued-in) mahogany neck (with maple stripe), and a 20-fret rosewood fretboard.
Electronically it is a very simple instrument - just one volume and tone control, and a single DP-8 pickup. And thanks to the mahogany body and neck it is a comparatively light bass - this example weighs in around 4.0kgs.
Model: 1977 Guild B-301
Scale: 34"
Frets: 20
Body: Mahogany body. 17 3/4" long, 14 1/4" wide, 1 3/8" thick. Overall length 46"
Neck: Three piece; mahogany with a maple stripe, fretless. Rosewood fretboard. Width at nut 1 5/8"
Weight: 4.0kg
The September 1977 Guild price list includes the B-301 / B-302 listed at $380 / $450 respectively. This price list also mentions the B-301F (fretless, no extra cost), B-301A (ash body and maple neck, $420) and even the B-301AF (fretless, ash body, $420).
The Guild B-301 was described as follows in the 1978 Guild catalog:
All-mahogany contoured solid body in the new Guild shape. Wide-fret fingerboard on a 3-piece mahogany neck with fully adjustable truss rod. Rosewood fingerboard with inlaid mother-of-pearl position dots. Inlaid headpiece. All hardware chrome plated. Heavy duty chrome plated bass machines. Newly engineered, fully adjustable, solid brass bridge/tailpiece. White-edged laminated black guardplate.
Guild B-301 bass - a closer look
The Guild B-301/302 (and S-60, S-70 and S-300 guitars) had a very distinctive body shape, quite unlike anything that had come before them! The bass models and S-60/S-70 are particularly appealing with their scratchplate matching the curvature of the body edges.

The Guild B301/B302 basses had the solid brass, chrome-plated
BT-4 bridge, a vast improvement on the older Hagstrom-made bridges fitted to earlier basses. One issue, though, is the short distance between the string end and the saddle - for best intonation, strings without silk wraps (unlike the strings used here) are preferable.

The controls are very simple: just a volume and tone control for each pickup. Control knobs are black plastic, with chrome G-logo insert. They are numbered 1-9 and marked tone / volume, although the original white lettering has totally worn away. This style control knob is more typically associated with late 1960s mid- 1970s instruments, and are only seen on the earliest B-series basses.

The bass is fitted with one
Guild DP-8 eight-pole single coil pickup, with two poles for each string, "for even output".

The pickup unit is spring-mounted through the coil itself. Two bolts (responsible for both mounting and height adjustment) attach to a brass plate screwed into the pickup plate - similar to the mounting of a P90.

Headstock front with inlays; Guild logo and Chesterfield motif.

Reverse headstock detail; Schaller M4s tuning keys, with serial number stamped at the very top of the headstock. This dates this particular bass to 1977.
1977 Guild B-301 bass 'supporting members' content
Extra content on this guitar is included in the Supporting Members area here
- 28 extra images (with description): large detailed images including body routes, circuitry, components
- Detailed wiring diagram
- Scratchplate tracing (PDF for accurate printing)