Good Morning, David :
Krieghoff made two types of brown checkered grips.
The fine checkered ones are Ritzmann grips.
Another type of coarse, brown checkered grips were made that are very similar to Black Widow grips...without the numbers and initials molded on the inside surfaces...the pattern of these second type of brown plastic grips have a much more coarse checkering pattern...
p.s. One last photo...
Regards,
Pete... <img src="graemlins/yltype.gif" border="0" alt="[typing]" />