u/Bucky_Gatsby

In our house we have a corner for things we no longer need...I found this Seiko watch in the box in it today. Is it legit? It has seen better days, the stainless steel seems to have corroded somehow. Any way I can restore this? Or alternatively buy a new case for the movement? I am a little bit into watches, but I've only bought cheaper Chinese ones so far. Never had a Seiko before. Any help would be appreciated!