Omega 166.0210 with cal 1022

Hi,
Ive had this watch for a month now and finally finished servicing the movement. Now I am onto the case. Case is 166.0210. So far I only needed to replace the crown. My dilemma is what band or strap would you suggest. It originally came with a flexi band which I've replaced. However I am tossing up between leather or the correct bracelet. Picture is before the service. Ive cleaned the case, crystal and dial. So it's almost ready.
Any suggestions would be appreciated.

Thank you, yes I only spent £5 on a flexi band but maybe get a green leather band for it. What buckle style was used in the 70s?

I would go for a leather strap, no worries with that classical solution.