Universal Helio-chronometer, with rag-bolt, screwdriven box key with accessories (3 pieces), Pilkington and Gibbs Ltd., Preston, Lancashire, early 20th century. Universal Helio-chronometer, with accessories 1901-1930
Sol-horometer, by Pilkington and Gibbs, Preston, design patented in 1911 Sol-horometer, by Pilkington and Gibbs
Ferguson solar chronometer, model B, with flexible dial (printed on two separate thin cards) and booklet, in wooden cover, base of which forms stand for instrument Ferguson solar chronometer
