Hi Helmut,
Yes it could be one of the Val Page bikes, but it seems to have a curvy chrome tank with painted panels, and the word "Triumph" on the tank is smaller and in a different script to the Page bikes. I have a 1936 catalogue, and the only bike that is like this is the Model 6/1 (the page parallel twin) but it has an 8" head lamp. Most of the Page bikes have plain black tanks.
The catalogue talks about an extra called the "S.S. Equipment" (super sport maybe?) which is an upgrade to chrome tank, a panel in the tank, foot gearchange, and 8" headlamp.
The bike in the photo is has the single horizontal head-light brackets (like the Model 2/1 250, but unlike the up-market Model L.2/1) but still has the small headlamp.
The bike is not in the 1936 catalogue, not is it a 1937 model.
No shortage of illustrations of a 1937 Tiger 70, but I can't find an illustration of a 1936 Tiger 70 as introduced in 1936.
Cheers
Leon