Dating seiko chronograph watches my daughter is dating a black dude
It has a titanium crown, helium escape valve and case back and a double-domed sapphire crystal.
Dating all the way back to the 1880s, Seiko is famed for excellent and dependable timepieces and clocks.
The concept and the manufacturing technique was the precursor to that developed by Swatch some 10 years later.
The watch was "standard issue" to the Basel City Fire Department.
At 44m wide it's quite a big watch and yet the case design with short, sloping lugs, suits even my slender : 1960's Breitling Datora, featuring a 45 minute chronograph with units per hour and pulsations scales.
The rotating outer bezel can be used to show elapsed seconds or the time in a second time zone.