mono slider but 6 pins plus frame anchors
3 of the pins are the pot function , 2 one end and one the other. The other
2 plus 1 are dummies. Inside, the slider is split into 2 . One wiper doing
the mono wiper action and the other vainly wiping along 2 x 2.5K resistive
tracks not connected to the pins or anywhere , why? Just for feel is the
only reason I can come up with along with standardising on one outer body
and pinning manufacturing line (and for to confuse repairmen)

10K slider pot , Chinese, marked Soundwell , N B103, 738B103