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| | Tartan Name | Oriflame |  |  |  | Category | Corporate | Reference | 10961 |  | Designer | Romare |  |  |  | Date Recorded | 18/12/2013 |  |  | 
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| | Tartan Name | Orillia |  |  |  | Category | District | Reference | 11797 |  | Designer | Waddell/Penny |  |  |  | Date Recorded | 22/05/2017 |  |  | 
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| | Tartan Name | Orion Nebula |  |  |  | Category | Fashion | Reference | 10632 |  | Designer | Arpin, Pierre |  |  |  | Date Recorded | 12/06/2012 |  |  | 
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| | Tartan Name | Orkney |  |  |  | Category | Fashion |  |  |  | Designer | Hek, Ronnie | STA Ref | 2681 |  | Date Recorded | Not Specified | STWR Ref | 2681 | 
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| | Tartan Name | Orkney Heather |  |  |  | Category | Fashion | Reference | 11138 |  | Designer | Ewing, Morag |  |  |  | Date Recorded | 21/10/2014 |  |  | 
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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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