This green grinder, no maker mark, was my first, an average but decent quality crank grinder. After a short period I sold it and bought the GP and Prairie grinders. The gear ratio was 9:1. Looks very similar to common 1929 grinder below (red) but is of better quality.
An infamous Dec 29th, 1929 grinder in bright red. A freebie that came with the GP grinder. If you've been around grinders much you'll know these are common as fleas on a fox. Judging by the wheel it got a lot of use but unfortunately there is no simple way to secure the arbor from turning as you try to loosen the arbor nut. Gear ratio is the common 9:1