I have got one just like that that. Mine has a decal that just reads,"Mott Hammer Knife". Alamo is not mentioned on it. Probably it predated the Alamo take over. It was bought from the local IH dealer in the 50's. It still has the Clinton engine that came on it new. I don't use it but it ran the last time I used it before putting it under the shed here. I turn the pulley on the engine occasionally to keep it free.
I also have a 3 point hitch 60 " Mott flail mower hooked to my John Deere 650 compact diesel tractor I have been using for more almost 30 years. It is the second one of these mowers I have owned. The first one I let a fellow have it so I could sell him the IH Cub 154 lo-boy tractor I had. That was the most useless trouble giving thing I ever owned. These mowers are the kind you either love or hate, no middle ground. I would like to sell the 36' push model, but have no idea of the value.