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William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', page 1. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', page 2. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', page 3. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', page 4. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', page 5. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', spec 1. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', spec 2. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', spec 3. 15914.
William Renard Pilkington (1911) Patent for 'Pilkington’s Sol Horometer', spec 4. 15914.
Unknown, . (1911) Will You Help [SSM21_1911]. Unknown.