I have one auto Omega Speedy and more than a dozen or so quarts of various makes starting with a vintage 1970 Seiko. My Speedy has been my favorite watch and up until recently was worn daily. Have had it serviced three to four times in the last 20 years at a pretty hefty expense. All of my quartzs are still working. None have had the back removed except to replace the battery. Therefore, save yourself some money both initially and during the period you have the watch and go for quartz. There is another unmentioned but very important benefit in gettind quartz: ACCURACY!:No comparison between accuracy of quartz versus mechanical. Charlie Either should be fine for your purpose. The quartz might have
: a slight edge if you are into more physical sports. But an
: auto should be fine for tennis.
: Quartz eventually craps out. Replacement parts for old
: electronic mechanisms are usually hard to find. Salvaging
: idential parts from other quartz mechanisms is only a
: temporary solution as they will crap out too.
: The biggest advantage to mechanical is when replacement parts
: cannot be found, they can be salvaged from other watches
: with the same movement, altered from other available watch
: parts, or at worst handcrafted from scratch.