Seiwa was a Japanese builder, and its Rockman Series basses are a rare, quirky find today. This one pairs a light blue sparkle finish with a maple fingerboard and a single proprietary P-style pickup run through simple volume and tone controls. It's a unique and funky bass with a look and voice you won't find on every other stage.
It's playing well and in very nice shape overall, with a few things to note. There is one finish crack at the body contour. The bridge was moved back to set the intonation correctly, which leaves a finish shadow in front of the bridge where it originally sat. With the action set very low, there's a little fret smack at the upper end of the fingerboard; at normal action it plays well. Electronics and hardware are original. See photos for a close look.
\- Make: Seiwa
\- Model: Rockman Series
\- Finish: Light Blue Sparkle
\- Fingerboard: Maple
\- Pickups: Proprietary P-style pickup (original)
\- Controls: Volume, tone
\- Modifications: None (bridge relocated for intonation)
\- Weight: 9 lb 7 oz
\- Condition: Very Good
\- Includes: Gig bag
\- Known Issues: Finish crack at body contour; finish shadow in front of the bridge from its original position; slight fret smack at the upper frets with very low action
Ships carefully packed and insured for full value. International buyers are welcome — please contact us for a shipping quote before purchasing.
About Mill River Music
Mill River Music is an independent, human-powered music shop located in downtown Northampton, MA, run by a team of players, enthusiasts, and certified repair technicians. Every piece of used gear we sell is personally inspected, tested, and set up before it ships — we don't list it until we'd be happy to play it ourselves.
As Martin and Taylor certified techs, we hold our guitar work to a high standard, and we're committed to full transparency about the condition of everything we sell. No surprises.
When you buy from Mill River, you're supporting an independent local business that genuinely cares — about gear, about players, and about doing things right. We're here every step of the way. Reach out anytime.
