Definitely not. Boom is way too short. Remember "Jibe ho" on a CC and ducking your head, so as not to be knocked overboard when the boom swung over during a jibe?
Also most people don't clip a halyard to the end of the boom, rather they put it up by the mast, so in this painting, it must be a stay, and we never had stays from the top of the mast to the end of the boom. CC Knockabout, not Runabout.
The picture is very similar but not quite a Cape Cod Knockabout -- the boatin the picture has two side stays on each side and our boat had only one oneach side. You might like to go to Explorer and enter Cape Cod KnockaboutSailboat -- amazing what I found!!
Richard McM is correct. Furthermore, the class Cape Cod Knockabout, not Runabout. --COSMO, Editor