The Astro is given the following write-up in the 1968 Vox The Sound that Travels with the Stars guitar brochure
Astro IV V273. An electric acoustic bass guitar with the popular violin shape body. Has built-in G tuner, distortion booster, treble and bass booster. All new easy-to-fret fast-neck features the Vox double T-bar and adjustable steel rod. Has two exclusive Vox Ferro-Sonic pickups. Fully adjustable bridge. One volume, two tone controls, 3-pickup selector switch. Jumbo size chrome plated machine heads. Sunburst, Cherry or Sandburst.