The tongue is made of a lightweight breathable mesh on the outside and a soft lining on the inside. Make sure the join has no stitch line showing.
Air Max 1 Essentials will have an outsole glued to the PU midsole, you can see the join line just below the Air Unit window? Make sure no excess glue marks are showing.
Remove the sockliners and look underneath. Check that the sockliners have a Swoosh logo debossed into the rubber. Make sure the debossing is clean with sharp edges.
The outsole and PU midsole of Nike Air Max 1's are made from a lightweight material that is highly flexible. Demonstrated by bending the shoe without much force.
Check out the full 28 point step-by-step guide on goVerify.it