This is a 36mm. 1977 ROLEX Oyster Perpetual Datejust THUNDERBIRD stainless steel with defined 14k. solid gold THUNDERBIRD bezel. This original dial is as clean as you will ever find, with all lume plots present. The baton hands are original. The caliber 1570 automatic winding movement was just cleaned and is accurately keeping time. Often these solid gold bezels are worn-not this one…stellar. This Rolex Datejust THUNDERBIRD is a true classic that has been steadily rising in value and becoming harder to find these days-especially this clean.