Seiko Speedmaster 5/100 second chronograph. Model number: 7A28-7050A4 Vintage, made in Japan in 1983. This is a unique watch with a watch body that rotates 360 degrees. It's in pretty good condition for a 42-year-old model. There is almost no wear on the back cover from the belt. The clasp is also secure. Original belt. There are no problems with the operation, and both the time and chronograph functions work. The buttons also function correctly. Belt size: approximately 16.5 cm Dial color: Black Belt color: Silver