Herring Gull HT-230858 2cy (argentatus), August 07 2002, Tampere, Finland (61.31N,23.43E).

A 2cy argentatus, ringed in Finland: metal ring 230858.
The complete moult is well underway with most wing-coverts and the inner primaries moulted to second generation. All juvenile primaries have been shed. P1-P7 are fully grown second generation flight-feathers. Most of the tail-feathers are replaced, the inner tail-feathers are renewed and show a neat white fringe.
The tertials and most of the wing-coverts are replaced for second generation feathers. All scapulars have been replaced by at least second generation feathers, including the scapulars in the lowest row. In the upper scapulars, many feathers appear neat third generation scapulars, with a warm buffish tone, still much second generation-like in their pattern.

By August, the warm brown tones of the first moulted wing-coverts (inner greater coverts and inner median coverts) are faded to plain white, leaving a contrasting barred pattern on the wing-coverts. On average, 2cy argentatus is more contrastingly patterned than same aged 2cy argenteus, especially regarding the pattern on the central greater coverts and the white belly and flanks. However, some argentatus (like this individual) are distinct "washed out" brown or more vermiculated patterned, reminiscent of 2cy argenteus. 
The last moulted coverts are the central greater coverts and outer lesser coverts, replaced by mid-August. From mid-August onwards, 2cy argentatus start the partial autumn moult, starting again to drop the upper tertial and inner greater and median coverts.

In the table below, the primary moult scores of 2cy August argentatus in Finland can be read: