Where my late father worked in Oxfordshire, England their sole combine was a 1964 Clayson M103 which was supplemented with a 1967 Clayson M135 in about 1970, very similar to your setup, excellent video.
Awesome video ! Beautiful old combine harvesters, probably costs a fortune to keep them in such a perfect condition, but it sure costs a several fortunes to buy a new one ! :-):-):-)
I said to myself, "He's going to bump that spout on the trailer." And sure enough, it happened. Still, doesn't look like any damage was done, that's good.