Besides the normal range of wall and ceiling-mounted flat-belt drive countershaft units (of which several early versions can be seen here) by the early 1930s Stark were offering a neat, self-contained motor drive unit mounted on a substantial cast-iron frame and designed to fit beneath a bench-mounted lathe or miller. It was marketed not only for the company's own products, but could easily be set up to drive many other small machines which would otherwise have required a separate and cumbersome countershaft unit.
The unit, along similar lines of the Rivett "Oil Pan Stand" arrangement,  consisted of a supporting frame, motor and coupling, 3-speed gearbox and drum-type reversing switch. The speed-change lever could be operated whilst the drive was running and the gearbox - with non-metallic gears engaging with hardened steel gears running hardened shaft - ran in an oil bath. The box contained three shafts, all supported on adjustable Timken roller-bearings.
Unfortunately, instead of being arranged to mount longitudinally, the unit was designed to be positioned transversely which made the bench unacceptably deep.