[Hugh]

I think that the early DWM grips were hand checkered as they show a much better attention to the spacing and overall pattern. It is possible that later wartime grips may have been done with some type of hand held power tool. An awful lot of them show a widening of the spacing at the edge of the grips which would be a lot more easy to do with a power tool than with a hand cutter. On the other hand, however, if workers were hard pressed to produce quantity rather than quality under war time conditions, it would be easy to get careless as you neared the edge of the grip and let the tool wander.

I don't remember if this subject was mentioned in Datig's book or not.