| United Arab Emirates- Revenue Stamps |
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| United Kingdom- England Regional Issues |
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| United Kingdom- Northern Ireland Regional Issues |
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| United Kingdom- Northern Ireland Revenue Stamps |
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| United Kingdom of Great Britain & Northern Ireland |
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| United Kingdom- Private Mail Stamps |
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| United Kingdom- Private Post Offices |
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| United Kingdom- Revenue Stamps |
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| United Kingdom- Scotland Regional Issues |
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| United Kingdom- Scotland Revenues |
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| United Kingdom- Sealand Cinderella Stamps |
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| United Kingdom- Wales Regional Issues |
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| United Nations, Offices in Geneva Switzerland |
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| United Nations, Offices in New York |
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| United Nations, Offices in Vienna Austria |
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| United States - BOB |
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| United States of America |
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| United States of America- Revenue Stamps |
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| UNO Geneva |
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| UNO New York |
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