DJ 16013 - Permanent Damage

[vesnyder]

I have a 35 year old DJ that I have had since new. I have worn the watch daily for most of it's life. I've noted that the watch is currently losing about 16-18 seconds per day. I went back and looked at the service records and realized that it was last serviced in 1999! I want to make sure I do not do any permanent damage by continuing to wear it. Should I: 1) put it in the watch case until I am ready to have it serviced, 2) wear it as usual, or 3) have it serviced immediately?

Thanks for your expertise!