Nice made over V72! From the way you have it set up: the engraved train wheel bridge renders a pre-80s model. The "Registered Design" incision and an early 6 mil serial would be safe. I too am in doubt regarding the random last 4 or 5 digit, so gurus chime in please...
I wouldn't worry too much about the alignment of letters but the laser sharpness (not laser engraving) and clean incisions is what very difficult to replicate. I have older DJ cases with both crooked and neat squary engravings from different eras, some are even left or right justified between lugs but they all have one thing in common, super sharp, narrow and clean incisions. We are on the same boat pursuing the best engraver to do the same thing, I have 3 cases from the same eBay seller, group buy? LOL
I may have a Viet bezel for you, PM me for details.