For all our maritime needs we always trust americanmarinesupply.com, they get all the accessories that we need for our boat. And they also have this nautical clocks, we need to get one for our new boat. Keeping track with the time, tides is very important for a vessel.
They offer not just nautical clocks but also all accessories for your boat, my husband bought his GPS and its accessories from them. All the things you need for your power boat or sail boat, they all have it, check out their site and I am sure you will find all the things that you are looking for.