Hi Arturro,
Looks like a 1913 (edit: model R) or 1914 Model W (two speed, foot operated clutch, rear brake pedal mounted at the front of the RHS footboard, earlier than 1915 rear stand, later than 1912 inlet manifold). The thinner lower front fork link seems to me to indicate earlier rather than later, i.e. 1913 rather than 1914, but I am certainly not 100% on that and would have to look into it some more.
cheers
Hutch
