I'm not really a fan of old chainsaws, much like old outboard motors they're fun to look at but when I pull that cord it has to start and run. I'm not going to put up with cantankerousness, and with a non-starting outboard out on a lake there's not much option to walk home.
But saws of a certain age, like this 1961 Pioneer NU17 belong in the so-far-fictitious Museum of Die Casting, being made up of multiple beautifully diecast aluminum parts. This model saw was made in Peterborough, Ontario by Pioneer, another long gone manufacturer. Previous post here.
Looking into the specs of the saw, the engine is 90cc, horsepower unspecified but it was supplied with blades 16-20 inches in length. The weight, though also unlisted in the specs here, is substantial.