3cy+ April. Note the contrast betwen fresh inner pre-breeding GC4-10 (with dark blackish-grey centre with broad grey to greyish-white edges and tips) and intermediately worn outer post-breeding GC1-3 (which have the same basic pattern but has bleached to medium grey and have worn off some of the white in the edges/tips). Note also the inner three GC with a slightly different pattern, creating a 'false contrast'. [1ET29450]