At the risk of confusing the current issue, here are three 10 guards that I have.
The left one is I believe the original that arrived with my 10E.
The other two are of unknown vintage/history although I think they are increasingly younger from left to right.(oldest to the left)
In addition to the omission of the side slots, I believe the middle one is pour cast and the right one is die cast.
Note the riving knife slot varies as well as the length of the rear projection.
The last pix shows two riving knife brackets. Tho one on top is I believe a later version and it is plated whereas the 'original 10E one is not plated.
Note the different 'grind' on the edge of the riving knife. Also it is on the side opposite the drawing in the earlier discussion regarding the extra line. The shape is the same(bends/holes etc..
[attachment=4]$matches[2][/attachment]
[attachment=3]$matches[2][/attachment]
[attachment=2]$matches[2][/attachment]
[attachment=1]$matches[2][/attachment]




