SIDE BY SIDE ACRYLIC AXIS GAUGE FOR WECO EDGE BLOCKS
This new Side By Side gauge allows a quick, accurate visual inspection of blocked or edged lens pairs like the back to back above but now you can have it in a side by side.
Any error in blocking or slippage during edging will be picked up by the parallel etched lines on the acrylic base. Lines are etched on both surfaces to prevent errors in parallax. Available in most edge block designs.