I have several old art deco watches that run but the dial faces have yellow spots. Can I do any type of cleaning to fix this safely.

Question edited for clarity.
Question moved to maker category.

Better to let a jeweler do it, but it you want to try

You'll just have to find the manual somewhere. That's a chronometer, not just a watch. Much more complicated than a watch. Perhaps you should get a simpler watch.

take it to a jeweller for repair

The analog hands and face are clean looking and manage to give the watch a classic face. It won't turn any heads, positively or negatively. The hands are rather thin and silver which makes it blend in too easily with the face. Stupidly, Casio put a vertical and horizontal silver line on the face which further causes the hands to be visually lost. The hands aren't hard to see, but because they blend they aren't easy to see either. And there is no second hand at all; but the digital portion covers that function.

The digital portion in the bottom can only display two rows of information. So it's either day/date, or time/seconds. The top row is hard to see because the face shadows over it partially. The numbers are on the small side; not for old eyes. The digital portion has all the fundamental functions: time/date, hourly chime, chrono, 3 alarms, count down, dual time, and even "data bank" which is a very crude phone/number data bank.

The LED's are the old 80's yellowish tinge type and do a very poor job of illuminating the face... but if you're in the dark, it'll do the job. The hands have glow in the dark paint on them which also helps you just barely make out the time in the dark.

There is just nothing great at all about this watch; but it does everything you REALLY need a watch to do. Couple this with the 10-year battery, 100M water resistance, and $25 price tag, and you have something that just gets the job done reliably and economically. It might be plain vanilla, but it's real and hits the spot.

Turn the dial toward you and pull out. Then turn the dial away from you to change the date (you can only go upward in date).

mcdevito75 here, Besides online with Timex for another original strap, you can also look for a small watch repair shop in your area for a replacement strap.

Sounds like a failing battery to me. Its very common for a watch to loose time when battery needs to be changed.

vinegar and bicarbinate of soda will work perfectly

Nobody can tell you this by the number only exept Cartier itself.
Follow this link, enter details and ask questions directly to Cartier:

http://www.cartier.com/en_na/Cartier

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Watch cases and bracelets are cleaned in ultrasonic cleaning maschine with the help of special clening liquids.
Mechanical watch movements and mechanical parts of quartz and analog watches are cleaned in special watch cleaning maschines in 3-5 cleaning stages and cleaners.
Electronic parts, circuit boards, LCD screens are cleaned by hand using specialy made cleaning solutions for each individual part.
To do all this you need a watchmakers skills as the watch must be disassembled completely.
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