That’s a bit odd. Unless the Airstream you have had some serious shell exterior repairs those should all be bucked rivets.
Olympic rivets are a type of “pop” rivet with a tightly fitting mandrel used to pull the rivet and three ‘wings’ that expand in the interior space. Is that what you are seeing?
The second question is “were you the first owner and did you buy it new?” Or did the dealer repair some damage?
This is rather odd as Airstreams usually have bucked rivets throughout all areas the exterior shell, and conventional pop rivets holding interior aluminum in place only.
Something is not as it seems here...or as it should be.
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.