Cool Rolex of the Day #2006: 1625 Datejust Turn-O-Graph "Thunderbird" with rare slate/ghost dial, two-tone (yellow gold & steel), 36mm. Circa 1971 : r/ rolex
TBT The Rolex 1625 Turn-o-Graph - Going Under the Radar
Vintage Rolex Datejust 1625 Turnograph for sale
1977 Vintage Rolex Datejust Ref. 1625 "Thunderbird" Turn-O-Graph Two T – Second Time Around Watch Company