« Sigma Big Red » transitional dial
You thought you knew it all about the « Big Red »? Here is a rare transitional dial between the « Sigma » period and the « Big Red ». In the old days Rolex did not want to throw away dials that were already made for the previous version of their watches. Sigma dials were promoting the use of gold in the watches. The symbol of the association APRIOR (Association pour la Promotion Industrielle de l’OR) was the greek letter sigma « σ ». The present watch is one of those few transition dial that existed.
Serial: 4.13x.xxx (1976)
Dial: flawless original very silvery « soleil » dial with sun rays effect. Big Red above the bottom subregister and the | σ | Τ |SWISS| Τ | σ | underneath it. All the tritium dots are present and despite some showing some slight loss the all work perfectly well under the UV test (glow green & vanish quickly). Original tritium handset matches perfectly.
Case: if it has been polished in the past it must have been very lightly as it retains original thick proportions and sharp beveled edges with satin finish still visible. Distance of the holes from the edges is large & equidistant.
Pushers: original MK1 (no circular line) matching the period
Mouvement: Valjoux 727
Bracelet: original oyster bracelet 78350/19, 571 end links with « 1 76 » on the clasp matching the period.
Box & Papers: Rolex written guarantee, booklets, box & cover box.