I have a Tag Automatic (3000 series I think) dating from 1995... It's been serviced once, repaired (bezel spring) and serviced again, other than that it's been worn almost every day. Still keeps pretty good time. It was bought for my 21st birthday by my parents from David M. Robinson in Liverpool, they did the service (1999) and the repair/service (2004 IIRC). I can't remember whether they did the work 'in house' or whether they sent it to TAG, however, after last time it was in I was advised - run it until it stops/doesn't keep good time, then have it serviced. As for all the 'wear' marks - I'm proud of them. When my parents gave me the watch they told me - wear it every day and enjoy it... don't keep it for best.
Obviously you may want different - and that's your call, obviously!