1x crown D5850-9 knob straight line two

1x crown D5850-9 knob. Earlier Straight line two pre amplifier.

These are not for dc300a mk2 or d150a mk2 amplifier. They look similar BUT are a lot smaller.
Top diameter: 15mm

Bottom diameter 21mm

Height: 23mm

Shaft style: D

Shaft diameter: 6mm