This floating bridge was fitted to wide range of electric acoustic guitars produced at the Matsumoku guitar factory, Matsumoto Japan; from the mid/late 1960s to the mid 1970s. This facility produced guitars for export around the world, and this bridge appeared on guitars branded: Angelica, Aria (5002T, 5102T), Aria Diamond (1202T, 1302T), Commodore (N177 / N25), Conrad, Domino (Dawson 40E2), Epiphone (5102T / EA-250), Lyle (5102T), Raven, Stewart, Univox (HR-2 / Coily), Ventura (V1001, V1002, V1400, V1500) - and most likely many, many more.
The bridge is easily positioned thanks to the paper position marker glued to the guitar body (see below).
The bridge consists a 'tray' with individual intonatable saddles, over a rosewood base. Height is adjusted by two wheels, one at each end - 22mm diameter, 2.75mm thick. A thin, clear plastic strip sits beneath the saddles (presumably to reduce friction when adjusted) - dimensions 15mm x 64mm x 0.3mm (rough cut, ends not straight). The six saddles are each mounted on 21mm x 2.9mm cross head dome bolts.