>>134952as much as i love the mechanics behind automatic movements, digital quartz watches have no moving parts and are much more consistent in accuracy
power source shouldn't be a problem either, they last for years and CR2016's are found in any place that carries AA and AAA batteries
>>134890casio F91W is an excellent and proven watch. if you need more resistance, get one from their g-shock line. the DW5600 is their iconic staple