This is not a vintage Zenith as such. It is a commemorative piece that Zenith produced in 2000 for the 500th anniversary of Brazil. The first of 75 pieces was presented by the then Chairman of Zenith Francois Manfredini to the then President of Brazil Fernando Cardoso. As you can see, I have no. 25 of 75.
I'd like to know more about this watch, and am in touch with its designer in Portugal. Beyond specifications available in its box, papers and certificate of authenticity, I'd highly appreciate it if anyone can share more insights, information and/or anecdotes about this piece.
I've posted this one before but not on the new Veblonist rally strap that I just received. I think it suits this watch. Howard at Veblenist does great work and is very easy to deal with.