Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,395 pages of information and 211,465 images on early companies, their products and the people who designed and built them.
of 15 Wigmore Street, Cavendish Square, London, W1. Telephone: Langham 2000. Cables: "Pincenez, Wesdo, London". (1929)
Ditto Address and Cables. Telephone: Langham 4343. (1947)
1873  Henry Thomas Hamblin (better known as Theodore) was born at Walworth, London into a poor family. He was determined to emerge from the rut which everyone was destined to fall into without being able to afford proper school and training.
After a difficult start working in various jobs and being in debt he decided to become an Optician. Despite lack of money and poor prospects, his determination won him through and he qualified.
Hamblin went on to become an extremely successful businessman and founded Theodore Hamblin (now Dollond and Aitchison) which was frequented by royalty, the rich and the famous.
1929 Advert in British Industries Fair Catalogue as an Optical, Scientific and Photographic Exhibit. Manufacturers of Spectacles and Eyeglasses to Surgeons' Prescriptions and of Ophthalmic Instruments and Apparatus for the use of Medical men only. Ophthalmic Drawings and Lantern Slides illustrating diseased conditions of the Eye. (Scientific Section - Stand No. N.5) 
1947 Listed Exhibitor - British Industries Fair. Makers of Spectacles to Surgeons' Prescriptions. Manufacturers of Contact Lenses, Ophthalmic and Scientific Instruments, Orthoptic Training Appliances, Plastic Artificial Eyes and other Facial Prostheses, Ophthalmic Drawings, Laminated Glass, etc. (Olympia, Ground Floor, Stand No. D.1696)