autos on Vintage cards....ballpoint, sharpie or thin tip sharpie

Going to be getting some autos on vintage rookies (50s and 60) at show next month, and wanted to get others opinions...Besides obviously, making sure the color choice is correct, do you all prefer ballpoint, thin tip sharpies or regular sharpies on vintage cardboard?
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I am getting the autos myself, so I have the choice.
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Minnie Minoso Master and Basic
1967 Topps PSA 8+
1960's Topps run Mega Set
"For me, playing baseball has been like a war and I was defending the uniform I wore, Every time I put on the uniform I respected it like the American flag. I wore it like I was representing every Latin country."--Minnie Minoso