Yep everyone is right, they are called 2 man cross cut saws, which are also nicknamed Misery Whips. You have probably seen me type that name on here several times as I have a few of them.
The one in the picture is more then likely a cross-cutting saw for softwood. We have a lot of high school and college woodsman teams that play the Stihl Timber Sports type games here in Maine. Myself I played in the 2 man cross-cutting part of the game. Our rules here in Maine (and they might vary) meant the cookies we cut off were 12 inch in diameter White Pine Logs.
If anyone is looking for a new saw, they can still be purchased at such places as Baileys Logging Supply, Highland Hardware, and Snow and Neally. Just beware, the competition saws can fetch up to 1500 bucks.
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"