Congratulations to Jarl who gave the first clear answer to the mystery Heuer and therefore the outright winner. However, I cannot overlook the evidence Jeff presented which proved that the mystery watch is the elusive Heuer 510.547 Boxing Chronograph featured in the 1986 Time for Action catalogue. Therefore the Smaties go to the two of you. My thanks to Jasper of ClassicHeuer for supplying this beautiful NOS piece and to all those members who contributed to the game.
Round 3 - here it is.
Paul
www.heuerworld.com