"Part number 93608 in light bluish gray (listed as extra) is the lid of the
box but listed in the inventory as its shown in the instructions. Used copies
of this set may or may not have this part included."
"Part number 93608 in light bluish gray (listed as extra) is the lid of the
box but listed in the inventory as its shown in the instructions. Used copies
of this set may or may not have this part included."
is an essential part of the set. This one is not shown on the official part list
printed on the box, but it is counted in the official part count of the set and
is used to build the set in the instructions. Hence, it is considered a Regular
Item for inventory purposes by definition.