morton
I live for the CABE
The more I look at those fork tips the more bepuzzled I get. As you say, it looks like someone did it who knew what they were doing, but that still doesn't explain WHY they did it. Have you got a close-up?
Just a guess....
Could it be the dropouts were a "closed circle" instead of being open at the bottom for easier wheel remover?
I know it would be easier to just cut a slot, but who knows with amateur mods?