Being that #190 is from a Gage company, I thought it might be a gage to
determine mesh size of screens.

"R.H." wrote in message
.. .

"Jon Elson" wrote in message
rvers.com...
R.H. wrote:
Just posted a few more this morning:


http://puzzlephotos.blogspot.com/

190 has to be for spot lapping of surfaces. it looks just like a tiny
lapping plate.

Jon


This is probably correct.