As DRIZZNAY stated, you have variables to consider.
My opinion is that IF you have a sapphire crystal, triploc crown and a Swiss ETA movement, you can expect many years of service IF you look after your investment.
By that I mean to keep crown screwed down tight, check "O"ring on case tube, check case back for tightness AND have it looked at by a watchmaker in around 4-5 years. Oiling is a quick job on most "simple complication" watches and needs to be done. All seals should be replaced at the time of oiling.
let us know what you have coming, but in any event, ENJOY it
TXJB