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| Tartan Name | Orkney Magnus | | | | Category | Fashion
| Reference | 11158 | | Designer | Ewing, Morag | | | | Date Recorded | 03/11/2014 | | |
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| Tartan Name | Orkney Slate | | | | Category | Fashion
| Reference | 10440 | | Designer | Ewing, Morag | | | | Date Recorded | 22/06/2011 | | |
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| Tartan Name | Orlando Dress, City of | | | | Category | District
| | | | Designer | Brecheen, Eva | STA Ref | 6053 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Orlando Fire Department | | | | Category | Corporate
| | | | Designer | Brecheen, Eva | STA Ref | 3090 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Orlando Police Department | | | | Category | Corporate
| | | | Designer | Brecheen, Eva | STA Ref | 6054 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Orlando, City of | | | | Category | District
| | | | Designer | Brecheen, Eva | STA Ref | 3045 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Ormiston (Personal) | | | | Category | Name
| | | | Designer | Kinloch Anderson Ltd | STA Ref | none | | Date Recorded | Not Specified | STWR Ref | 3242 |
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| Tartan Name | Ormond College | | | | Category | Corporate
| Reference | 14454 | | Designer | McGreechin, Erin and Wilkinson, Emma | | | | Date Recorded | 03/09/2024 | | |
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| Tartan Name | Oromocto | | | | Category | District
| | | | Designer | Jenkins, Miss M Patricia | STA Ref | 6987 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Orr (2017) | | | | Category | Name
| Reference | 11867 | | Designer | Orr, Michael J | | | | Date Recorded | 31/07/2017 | | |
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| Tartan Name | Orr Sharp | | | | Category | Corporate
| Reference | 14640 | | Designer | Lochcarron of Scotland | | | | Date Recorded | 04/02/2025 | | |
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| Tartan Name | Orvis Sports Company | | | | Category | Corporate
| | | | Designer | Not Specified | STA Ref | 4222 | | Date Recorded | Not Specified | STWR Ref | none |
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