Nichael noted: 

> However, looking it them, my guess is that the 4-holded one
> is older.  I'm just guessing here, but the logo on the 2-holded
> shave is a staightforward Millers Falls logo, while on the 4-holded
> it is much smaller print and says:
>   M. F. Co. Millers Falls, Mass.
>      Pat Feb 9 1884   

another data point: 

My 2 holer has the same logo as Nichael's 4 holer above
and the date is  Feb19, not 9.

JN in NH