Mervyn Passmore has devised a unique way to identify the manufacturer and model of these clock movements quickly and accurately using a combination of maker's names, logos and the back plate width and height.
The information covers the majority of mass-produced mechanical movements manufactured during the last 100 years.
In 1976 Mervyn Passmore co-founded one of the world's leading distributors of clockmakers' supplies, and the records he kept and the experience and knowledge he gained over the years, combined with data and photos obtained from a large private collection of Anniversary Clocks, is now available to all.