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Auction: 20030 - The Gary Diffen Collection of Australian Colonies Errors Part 1 - New South Wales, Queensland, South Australia - conducted behind closed doors
Lot: 436

(x) South Australia
Departmental and Official Stamps
"O.S." (Official Stamps)
1891-99 perf 15 4d. slate-violet horizontal pair with "O.S." double, the right stamp with a slightly rounded top right corner, otherwise fresh and fine mint. S.G. O66a, £1100+. Photo

Note: The only mint examples derive from a block of eight discovered in the late 1980s and divided into two singles and three pairs.

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Sold for
£400

Starting price
£400