This gallery contains both OTA tractors and Singer tractors
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- OTA Monarch
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- OTA Australia Advert 1952
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- OTA Tractor
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Monarch
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- OTA Tractor
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- OTA Tractor
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- OTA Tractor
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- OTA Tractor
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- OTA Tractor
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- OTA Tractor
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- Singer Monarch
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- Singer Monarch
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- Singer Monarch
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- Singer Monarch
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- Singer Monarch
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- Singer Monarch
