Reading exclusive cover windows without erasing the first mint
An exclusive window is a later panel on the same issue number, not a time machine that deletes the opening mint.
Exclusive cover windows are the loud panels in any mint timeline. A guest artist, an event caption, a brighter costume. Clubs pin those covers on the cupboard and quietly forget the quieter first digital mint that preceded them. The ruler then lies. It looks as if the pretty cover invented the issue.
A Portal Trail Base series drop timeline keeps both ticks. The first mint stays on the left even if the exclusive is the copy everyone photographs. We label the exclusive as an exclusive, not as a replacement edition, unless a public publisher note actually says the earlier window was withdrawn. Withdrawal is rare. Overwriting is common. We refuse the common habit.
Marvel-themed event captions deserve extra care. Event language is trademark-heavy and easy to copy into a fake handbook voice. Write the caption as a description of what collectors saw on the drop page. Do not imply that Marvel Entertainment scheduled your club meeting. The independent-resource rule is not decoration; it keeps the timeline from pretending to be a studio almanac.
If two exclusives share a week, stack them as two ticks with different cover notes rather than merging them into a single “drop day.” Merged days are how Bangkok group chats lose a window forever.