Moon J-J WAL-B-ACT is a Japanese four-string bass custom built by P.G.M. (Professional Guitar Manufacture), the workshop identified by matching stamps and original “Custom Built by P.G.M.” labels on the instrument. Its serial number is 20491. The available dating places it around 1989–1991, most likely 1990; the year should be read as an estimate rather than a confirmed date.
The walnut body has natural birdseye-like figuring and an oil / wax-style finish. Cream binding follows both the body and the ebony fingerboard, an unusually extensive combination for a Moon bass. A maple neck, metal nut and gold hardware complete the construction. Available documentation describes the small birdseye-like marks on the back as natural wood grain, not dents.
Bartolini pickups feed an active Bartolini TCT preamp, controlled by a four-knob layout with an internal trim adjustment in the electronics cavity. Its sound is warm, articulate and clearly defined, with a controlled low end. At 4.5 kg, the bass comes with its original Moon soft case and new Pyramid Gold Flatwound 040–105 strings.
The bass is exceptionally well cared for and in excellent condition, with no notable dents, dings or other cosmetic damage found. All functions work as they should. Its matching workshop marks and P.G.M. labels provide a direct connection to the builder, while the exact production year remains an informed estimate.
Inspection & research notes
Inspection notes record that the bass is fully functional and everything works as it should. Condition notes record no notable dents, dings or other cosmetic damage; minor setup adjustments may be useful after shipping and climate adaptation.
