Civic,
You have a nice Seiko automatic watch.
Your piece was made in May, 1982 and has a workhorse ref. # 6309 movement..
This movement was used in Seiko dive watches for years and is considered rugged and reliable, and beats at 21,600 BPH making it a medium fast caliber. It is non-hacking, non windable, but it does have quickset day/date features.
This watch has all the features of the Seiko 5 branded watches....The Seiko 5 branding is a marketing effort and you can say you have the father of those watches.
Repair is up to you....Seiko is one of the best respected names in watches and eary non-quartz models are collectible.
You can spend a bunch and send it to an authorized Seiko Service Center, or you can find a good watchmaker to give it a good Clean, Oil and Adjust service and it will last for another 25 years. The crystal can easily be replaced or possibly polished up.
Get a nice Hirsch Traveler band and a deployant clasp and you will have a stunner and a great low-budget addition to any watch collectors watchbox.
Here is my 1970's 7009, which would be the grandfather of your 6309.