The Shiojiri Y143A is a Japanese quartz watch movement that features a day and date display. Shiojiri is the former name of Epson's micro-device manufacturing company, and these movements are also associated with the brand Pulsar. The Y143A is an older movement, and new replacements may be difficult to find.
Specifications
Manufacturer: Shiojiri (now Epson/Seiko)
Movement type: Quartz
Functions: Analog display with sweep seconds, day and date displays with quickset capability
Ligne size: 11.5''', a unit of measurement for watch movements, indicating its diameter