The gears are from Chester racing Products. The gears are ten splined. The smaller gear has 17 teeth. The larger one has 23 teeth. The gears are stamped C657556-1D7 and C657556-2D7. They are in very good condition.
Chester Quick Change Gear Set, 17 & 24 Teeth, 5.82/6.86 Ratio
Chester Quick Change Gear Set 3
504 / 427 QUICK CHANGE GEAR SET 2 RACE CHESTER TIGER IMCA CHESTER 031726-13
542 / 460 QUICK CHANGE GEAR SET 12c RACE WINTERS TIGER IMCA CHESTER 031626-11
486 / 411 QUICK CHANGE GEAR SET 1 RACE WINTERS TIGER IMCA CHESTER 031626-12
514 / 435 QUICK CHANGE GEAR Set 15c RACE WINTERS TIGER IMCA CHESTER 031626-15