Awesome and rare Seamaster Dynamic II a.k.a. "SPIDER" 
This watch is in great condition, the natural rubber strap is complete (and long) and adjustable 
Reference ST 196.0301 
International collection 1984 
Movement Type: Quartz electronic analogic 
Caliber number: 1430, created in 1982 
6 jewels 
Date 
Case: Stainless steel 
Case back: Screw-in 
Dial: With luminous hour markers and luminous hands (tritium) 
Crystal: Mineral 
Bracelet: Natural rubber 
Water resistance: 30 meters