The end of the filter in place in the still doesn't look like it has crimped edges?
IMHO hard to determine much of any detail. Like usual taking a clip from a low resolution film rarely provides any fine detail. Can't even really make out the bolt heads holding on the water pump
Another reason to search out more examples
Would it be possible this was a temporary screw on oil filter 'placebo' and was replaced later?
Possible if changed out at the engine plant but for what reason would Ford want to spend money installing and removing then reinstalling a filter? Think they could have built a throw away or reuseable mask like the ones for the water necks, fuel filter mating surface and so on. Also would not explain how others have found paint and runs on original filters that have seen. Easy to see we need to continue to discuss and search
I was thinking maybe the filters were installed later to keep them from getting damaged in transit to the assembly plant?
Know we have a number of period pictures with filters on crated engines that were shipped to car assembly plants and other places. Pretty sure they would have replaced one if damaged in route. Pretty sure Ford would have made sure that the process reduced (allot) the possibility of this happening to the engine. That would include the oil pan, valve covers .......
Don't think I've posted the original small block picture yet of the 2 millionth small block yet. should do that since it kind of relates to this discussion