Hi Karl,
I would go with what boats.net says. They're usually pretty accurate and that's good because it's where you're likely to want to find your parts for that old girl.
They say that VIN number is for a 1998 A model. See link just below:
For comparison, I've attached a page for 1999:
As well as a page for 2006:
I'm a carb guy so I chose the carburetor pages from their catalog.
Note that there's NO listing for A models in 2006. They are all D models. The D model was introduced in 2004 and subsequent.
For further reference, there is NO 25 hp listed for 1997.
The 2006 emissions label that NSDON listed has caught many people out, including me, into falsely thinking that was the year of manufacture. It was only recently that NSDON explained the reality to me and would indicate that sellers of those outboards were mistaken and not trying to be dishonest. They didn't know either unless they were the original owner. Even then, I believe that those labels could have likely misled some of those people if they weren't paying attention or became forgetful over time.
They might be a bit older but I think that the 98 25A outboards are probably great ones if regularly serviced and not abused too much over their life.
Welcome back and hope this helps.