Seller: fixing-time (137) 100%, Location: St. Helens, Merseyside, Ships to: GB & many other countries, Item: 132836252596 British Horological Institute Correspondence Course in Technical Horology first Printed 1963. This course consists of 12 Books. It is very in depth but assumes you know nothing at this stage. All the information within is still very valid. A real rare collection for anyone wanting to learn. These books are in very good condition.