Blancpain Dress Watch Circa 1970's

This is an unusual solid 18kt yellow gold Blancpain Dress watch from 1976. The coin edged yellow gold case has lots of patina on the gold and all hallmarks clearly visible. What is so unusual about this watch is the dial. It is a textured brown iridescent dial with large and exaggerated Roman numerals at 3, 6, 9 and 12. I have never seen a dial like this before. The watch even has a tiger eye crown to match the brown dial. This beauty is powered by a manual wind movement and comes with its original box and papers.