Used watch help

Hi,
I am new to this forum and need help choosing a used omega watch. Saw this Ad on the web and want to know if its fake or original. Tried searching the web for the same dial to match but did not find any.
The dial says 'Speedmaster, Automatic and Chronometer' and the seconds sub dial has no markings. I am assuming it a reduced model as it does not have date function. Like to know if anybody has seen the similar dial on the web or sote. Planning to visit the person selling the watch tomorrow. If it's fake then I don't want to waste my time.
Thank You

Thank you for your reply. I bought a used railmaster at an authorised dealer.