Hello, I'm new to the forum and new to luxury watches. About 4 weeks ago I purchased a Carrera Twin Time (calibre 7). I love the watch. I have been wearing it all through the work week. I'm fairly active (walking around and stuff like that). I give the watch a good wind at the beginning of the week and wear it all week long. I notice that when I take it off on Friday evenings I only get about 29 hours before the watch stops. Everything I read says to expect 42-46 hours depending on execution. So, I'm wondering if it is likely just me or if there may be a problem with the watch. I notice it runs about 5 seconds slow over the day (which I thought was OK). So, I'm wondering if I should be concerned and have the watch serviced or just chalk it up to my execution? Also, wondering if anybody has any opinions on the twin time? I know it isn't COSC or chronograph but to me the quality is very high and it is a beautiful watch. Any thoughts?