BRITISH HOROLOGICAL INSTITUTE
BRITISH HOROLOGICAL INSTITUTEhttp://www.bhi.co.uk/
AERO CLOCKS
AERO CLOCKShttp://www.aeroclocks.com/
POWERHOUSE MUSEUM – COLLECTION & RESEARCH – STRASBURG CLOCK
POWERHOUSE MUSEUM – COLLECTION & RESEARCH – STRASBURG CLOCKhttp://www.powerhousemuseum.com/collection/database/search_tags.php?tag=A44
SYNCHRONOME – UQ PHYSICS MUSEUM
SYNCHRONOME – UQ PHYSICS MUSEUMhttp://www.physics.uq.edu.au/physics_museum/Synchronome.html