Millers Falls No.1, 3 & 5 eggbeater drills
Type Study
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Millers Falls No.5 eggbeater drill; second example of Type 16. 
The triangular Millers Falls logo and model number are stamped on either side of the crank affixing screw, along with some lines, that perhaps were used to as a substitute for a lock washer, near the crank knob.  The protected-spring, 3-jaw chuck is no longer stamped with the patent date; and the thickly red lacquered hardwood main handle has a gently rounded flare. 
The major change is in the frame, which is now made of die-cast alloy.  The pinions have a more usual pressure angle.