
@coinfrog: the
DDR hubbing originally touched south of the final position. The dot and line segment you see are the left corner of the triangle and the top left corner of the door lintel, offset downwards on the coin face. Which means as the hubbing began, the die jolted north into its final position.
The line-in-door DDRs are basically just the permutations of 1. where the flat hub and convex die blank make first contact, and then 2. where the die blank jolts into its final position. Most jolts seem to go approximately north-south, a few go east-west, and a few show a significant degree of twist.