to help identify what movement you are looking for. Please post a pic of the watch and be sure to include a shot of the movement as well.
Worth and value are two very distinct terms in my opinon. Worth being high if the item has special meaning such as a graduation present.
Value in terms of dollars for a 1979 Timex quartz...have a look on eBay and you will see they can be had for less than a coffee StarBucks.