Seiko Flightmaster; strap suggestions?

My mother bought this Seiko for me when I started flying in the early 1990's. It was my daily watch until about 1998 when the battery died right after I had the minute hand for the alarm reattached. I had series of Seikos that lasted about all died in the next couple years before I bought a Seamaster.

Mom died last year, and I was thinking it would be nice to bring some life back into this watch. But, the band is sized for a younger me, and I don't have extra links. Is the watch worth trying to keep it original? I'm thinking a leather strap would suffice. Any suggestions?

Is the watch even worth a new band and battery? Should I put it away for another 20 years and save up for a Speedmaster or Navitimer?

Nato?

Thanks. I’ll check put Haveston.

I hadn’t considered the battery leaking. It has had since 1997 to make a mess.

Seems a new battery isn’t enough to bring this one back to life. Back to the jewelry box with it, and I’ll start lookinf for A Speedy or Navitimer.