In the mid 1960s Vox guitars were manufactured in a number of locations, including the Eko factory at Recanati in Italy. A few models, such as the Phantom and Mark series and the Wyman bass were made both in Italy and the UK, but Italian models, despite being broadly similar, had their own distinct features, including these heavy duty chrome knobs with rubber O-ring.
Dimensions: diameter (at base) 25mm, height 15mm. Grub screw, slotted head, 2.7mm x 6.2mm.
List of Vox control knobs