Seiko Quartz "Onyx Octa" Circa. 1981 STRAP but can’t verify the black

but can’t verify the black panels (despite seeing some claims of Onyx or Sardonyx)

Dimensions: 38mm

Watch comes MAX wrist at 16

with G motif reflecting on the sunlight

Seiko Quartz "Onyx Octa" Circa. 1981 STRAP but can’t verify the blackMaker seiko Model 5931 5350 Movement quartz Dimension 28x32mm Glass Condition side glass scratches at 9 o clock Dial Condition No dial corrosion Case Condition 9 10 with minimal sign of use Waterproof As they are Vintage pieces, please do not fully submerge the watch and minimal contact during hand washing Watch Summary a very rare seiko quartz variation from the early 80s, before the formation of the dolce line. a lacquer black dial with just a roman