Do you change batteries?

Yes.  Although the majority of the watches we service are
mechanical, we do change a great deal of batteries every
week.  We will change the gasket(s) as well as clean the
case & bracelet of every quartz watch that we change the
battery in.  When your watch leaves our shop it will be
water resistant to the marking on the dial or caseback
(30M, 50M, 100M, etc)