A Seiko Speed-Timer 5 6139-8001 single register chronograph with baton hands, black dial, yellow chronograph hands, day date function, and red minute track. On an aftermarket leather strap. 

Dimensions: 40mm diameter, 13.7mm thick, 44mm lug, and a 19mm lug with

In overall good condition, the mineral crystal shows significant wear, the day function does not work, the case shows a fair amount of wear, the watch runs and and all chronograph functions work, new gaskets put in on the caseback, pushers, and crown. (We do not guarantee functionality.)