Originally Posted by
JohnDThompson
Tange, Ishiwata, and Vitus also made rifled steer tubes. Columbus had 5 helical splines. Tange and Vitus had 6 helical splines. And Ishiwata had 5 straight splines.
I knew that, but was shooting for the highest %...which would be Columbus, I reckoned. Nevertheless, it's not the original fork so: moot.
BSC threading and 27.2, I'm voting "British" again...but no specific brand.