3+3. Nickel. These tuners are used on Duesenberg's 12-string guitars and the Mandola 12-string guitars. They have cylindric knurled knobs instead of usual tuner buttons. This allows more space saving installation. The position is fixed by two little pins, not with a screw. Caution: Order 2 sets for a 12-string headstock! Drill hole 10mm.
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