U.S. Masters Guitar Works 5 String Bass Fretless Natural

Very cool Fretless bass. Active Pickups and piezo in bridge. Excellent condition with hard shell case.

US Masters EP53 Fretless 5-string bass with Multi Voice active/passive and Piezo

Lacewood top and mahogany back.

35" scale.
19mm string spacing at bridge.
45mm nut.
8 pounds.

The bass is virtually unmarked. There's 2 small marks on the top lower bout edge. See last pic.
Not even a tiny mark anywhere on the backside.

Straight neck. Even relief on bass and treble sides.
The truss rod is smooth and easy in both directions.
Truss rod tool included.

Kent Armstrong humbuckers (US made) (with coil split, though US Masters calls it coil tap).

Hipshot, I think, bridge with Piezo saddles. These Piezo pickups actually work with La Bella nylon strings excellently. Many Piezo setups do not do this. (MM, Carvin)

Sperzel locking tuners.

The four toggle switches, top to bottom.
Switch #1) 3 position (magnetic pickups only, magnetic+piezo, piezo only)
Switch #2) 2 position (humbucking, single coil)
Switches #3+#4) These 2 switches work together. NOTCH FILTERS basically.  
#3 is a three position and when it is in the middle position the filters are not in play (off)
so the other 2 combinations are:
#3 up + #2 up
#3 up + #2 down
#3 down + #2 up
#3 down + #2 down.
These filters work in both active and passive modes.

The single toggle next to the concentric treble/bass knob is the active passive switch, bringing the tone control into play.

3 wooden knobs: Magnetic p/u vol., Magnetic p/u blend, Piezo vol.

The two jack outputs are:
1) Magnetic only.
2) Magnetic + Piezo.