Better pics of the front and back will help us immensely. It looks like an Accutron Deep Sea from the pic. These are very desirable and do have some value. Search eBay for "Bulova Accutron Deep Sea" and you will find a couple listed now. Others more familiar with this specific model will have more to say about it. On the case back, under the serial number, will be a small date code. It consists of a letter followed by a number. The letter "M" stands for the sixties with the letter "N" for the seventies. The number gives the specific year of manufacture of that decade. The Accutron tuning fork movement will be caliber 218. IMHO, yes, it is worth getting serviced to restore it to functioning condition. Service can be under $100 - if you hit the jackpot in finding a VERY reasonable watchmaker - to plus or minus $200. Part of the cost will depend on whether or not it only needs servicing or some parts also. Since the case is stainless steel, it can be polished to near new condition. The rotating bezel on yours looks to be in good condition. These usually show some nasty wear. If there are only minor scuffs and scratches on the crystal, they can easily be polished out. Service should only be performed by someone fully trained on tuning fork Accutrons. They have not been produced since 1977 and Bulova no longer supports them. There are many new old stock and used parts available to use if needed.
There are several Accutron service specialists here in the U.S. I have not used them. I currently use a watchmaker in Bulgaria for my service. His prices are reasonable and he has all the parts and equipment to service them. Others will chime in with their recommendations.
