Tudor 5 Decades of Chronographs Oysterdate Homeplate ...
Bezels had a blue, 500unit tachymetric scale in Ref: 7149, a brushed steel 500unit tachymetric scale in Ref: 7159, and a bidirectional 12unit scale in Ref: 7033. 9400 and 79100 Series Automatic, quotBig Blockquot Chronograph. In 1976, TUDOR launched a new product family, the 9400 series, representing a small revolution for the brand.