Purchased a US 190 from Kelleher that came with a PSE cert. Examined the back to find the faults mentioned on the cert. Noticed a regular pattern of indentions or projections that do not look like any of the US grills.
US grills I am familiar with have points in vertical and horizontal rows.
This item has "points" that are much longer horizontally than they are tall. And the
alternating vertical rows are offset.
What would have caused this pattern on the back?
(the black dot at the bottom of the photo is a spot on my lens)