1164

About the Omega 1164

It is the 7750 with Omega's finishing and rhodium plating: a cam-actuated chronograph with a horizontal clutch, the counters at 6, 9 and 12 o'clock and a date at 3, running at 28,800 vph with a 44-hour reserve and 25 jewels, at 30 mm across and 7.9 mm high. The 7750 piece explains the base and its reputation for service. The Piguet-based 3304 replaced it in the Speedmaster Date around 2009.

In the library it powers 18 Seamaster Diver 300M chronographs at 41.5 mm, including the America's Cup editions, and 13 Speedmaster Date models at 40 mm.

The 1152 and 1151 are the same family's other versions, the second with a day and date, and the 3330 the column-wheel chronograph that took over the smaller Speedmasters.