In this hobby of ours, there constantly exists the urge to dive down new rabbit holes and subgenres of watch collecting, awaiting the next reason for us to open our wallets and find a reason to justify purchasing another piece. While this typically takes the form of a unique color combination or bezel insert, what about a function like backlights" Sure, Timex?s Indiglo has most certainly found mainstay within the watch industry??as has Casio?s Electro Luminesce technology and of course lume??but what others are out there" For those who haven?t had the pleasure, I now have the honor of introducing you to the fairly forgotten Seiko 7559 movement, utilized here in its most unique application: the 5010 model. 

A Brief History of the Cal. 7559 and its Applications As is the story with most watches I tend to develop an interest in, little is known about the design process behind this movement or model outside of repair manuals, blog posts, and owner photographs. The information included here is based on my own research, and I invite anyone interested in this model or movement to include any additional material they may know in the comments section below. Though I?ve attempted to collect as much information on the subject as possible, I would be delighted to hear that more pictures or materials of any kind exist elsewhere. 

Production of the cal. 7559 began somewhere in the summer months of 1978 and continued until the late 1980s. The quartz movement itself is a r...