ROLEX gents wristwatch Oyster Perpetual Datejust Turn-O-Graph 'Thunderbird', reference 16263, self winding, E-series, superlative chronometer officially certified, stainless steel/gold combined including jubilee- bracelet, screwed-down case back & winding crown, sapphire loupe glass, bidirectional revolving yellow gold-bezel with 60-minutes graduation, diameter approx. 36 mm, length approx. 20,5 cm, signs of use due to age, original box & certificate, sold in March 1991, hand-setting has to be repaired, otherwise condition 2-3, discontinued model