Serge Manzon for Longines silver watch 1973

silver geometrical NOS watch designed by Serge Manzon for Longines in 1973

Helva silver mechanical watch 1960s

A sterling silver watch signed Helva, made in the 1960's.

Bifora silver bracelet watch 1960s

A silver watch made by Bifora, in the 1960's.

Serge Manzon for Longines silver watch, 1973

silver watch designed by Serge Manzon for Longines in 1973.