I recently saw a fellow selling these bars on ebay. I thought he did a good job with pics that shows the subtle differences between an NMW bar and a Lakewood. They both started with an Ideal brand tow latch.
Note how NMW used individual bolts to attache the Ideal latch.
alsi, the wide bar has a slightly different attaching design.
This Lakewood bar uses through bolts and spacers at the latch. I also dig the Lakewood logo decal. I love it when I find an NMW with a nice logo decal- though they are rare.
Here are the Lakewood style pins included with the Lakewood bar.