1930 Matchless Silver Hawk
In studying the photos, the "V" must be a very narrow angle, as it all appears to be contained in single crankcase and cylinder castings. I think this is a beautifully-proportioned design, handsome and properly British.
For much more on this bike, visit the Pipeburn site:
http://www.pipeburn.com/home/2016/06/17/1930-matchless-silver-hawk.html