Closer view of "Pro-Par" cap, it is actually clear plastic so you can see hub oil level.
Hose support just like the kit again, being "just" a storage trailer now the slider lock has been removed.
Square axle tube - just like AMT's kit again. Brakes on this one not fitted with backing plates, not uncommon on trailer brakes at one time.
While brake chambers are a bit different from kit parts (kit ones have smooth surface compared to the ribbed face on these ones) the single air tank, valve and non-spring brake chambers all match the kit as does suspension coss member.
As does landing gear.
Plenty of possibilities for the reissued Round 2 version of this old kit!