Most 180 or 185 tractors I've been around have a mechanical PTO engagement but that can differ depending on what the dealer in your area pushed to sell. I like the 3point features because the position control is a sperate lever to the rear of your remote levers. You can set the draft control with one rear lever, set the position with the other rear lever and then use the forward outside lever to lift and lower without worrying about if you have the same settings everything you lift and lower the 3 point hitch. The rear 2 levers which you didn't show, save your depth and draft settings. The Powet Director was introduced in 1957 but the live PTO was introduced in 1948 on the WD using a hand clutch running in oil which simply stopped the tractor's motion while leaving the PTO running. Works like the Power Director as far as the PTO goes but no 2 speed power shifting.
The Roto Baler came out in about 1947 spurring Allis to develop the WD with live PTO in 1948. Actually Allis bought the design in about 1940 or so from Luebben who was the man who invented it and Allis developed it into a succesd by 1947.
Not all Allis tractors. Not the D21, 210, 220 or any 7000 or 8000 series. Unless you are talking about the push pull know which still the D21 is electric fuel shut off and so are the 8000 series if I remember correct.
