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| | Tartan Name | Oakwood |  |  |  | Category | Fashion |  |  |  | Designer | Not Specified | STA Ref | 5532 |  | Date Recorded | Not Specified | STWR Ref | none | 
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| | Tartan Name | Obama Family |  |  |  | Category | Commemorative | Reference | 11839 |  | Designer | Halley, Brian Slanj Kilts |  |  |  | Date Recorded | 03/07/2017 |  |  | 
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| | Tartan Name | Oban |  |  |  | Category | Fashion |  |  |  | Designer | West Coast Woolen Mill | STA Ref | 5529 |  | Date Recorded | Not Specified | STWR Ref | none | 
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| | Tartan Name | Oban Grey |  |  |  | Category | District |  |  |  | Designer | Not Specified | STA Ref | none |  | Date Recorded | Not Specified | STWR Ref | 1237 | 
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| | Tartan Name | Oban Mist |  |  |  | Category | Fashion | Reference | 11010 |  | Designer | Teviotdale, Gemma |  |  |  | Date Recorded | 17/03/2014 |  |  | 
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| | Tartan Name | Oberon Black |  |  |  | Category | Corporate | Reference | 14984 |  | Designer | Kinloch Anderson Ltd |  |  |  | Date Recorded | 26/08/2025 |  |  | 
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| | Tartan Name | Ocean Sciences 2026 |  |  |  | Category | Corporate | Reference | 14620 |  | Designer | Wilton, Brian |  |  |  | Date Recorded | 21/01/2025 |  |  | 
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| | Tartan Name | Ochil Flora |  |  |  | Category | Fashion | Reference | 13156 |  | Designer | Hunter, Claire |  |  |  | Date Recorded | 11/05/2021 |  |  | 
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| | Tartan Name | Ocho de Febrero |  |  |  | Category | Fashion | Reference | 13851 |  | Designer | McGreechin, Erin and Teviotdale, Gemma |  |  |  | Date Recorded | 21/03/2023 |  |  | 
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| | Tartan Name | Ochterlonie |  |  |  | Category | Clan/Family |  |  |  | Designer | Dalgliesh, D C | STA Ref | 2677 |  | Date Recorded | Not Specified | STWR Ref | 2677 | 
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| | Tartan Name | OCLEES |  |  |  | Category | Corporate | Reference | 12955 |  | Designer | Brown, Craig |  |  |  | Date Recorded | 20/10/2020 |  |  | 
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| | Tartan Name | ODL |  |  |  | Category | Corporate |  |  |  | Designer | Not Specified | STA Ref | 7832 |  | Date Recorded | Not Specified | STWR Ref | none | 
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| | Tartan Name | Oeufs Brouilles |  |  |  | Category | Fashion | Reference | 14830 |  | Designer | Wakui, Mayumi |  |  |  | Date Recorded | 27/05/2025 |  |  | 
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| | Tartan Name | Ofally, County |  |  |  | Category | District |  |  |  | Designer | House of Edgar - Macnaughton Holdings Ltd. | STA Ref | 2268 |  | Date Recorded | Not Specified | STWR Ref | 2268 | 
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| | Tartan Name | Off Kilter Kilts |  |  |  | Category | Corporate | Reference | 11888 |  | Designer | Centonze, J T |  |  |  | Date Recorded | 08/08/2017 |  |  | 
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| | Tartan Name | Offaly County, Crest Range |  |  |  | Category | District |  |  |  | Designer | Viking Technology Limited | STA Ref | 7456 |  | Date Recorded | Not Specified | STWR Ref | 3097 | 
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