Interesting theory there so I just checked my two.
The first is initial production with the first type x guard and there are 17 graduations. The second has the 2nd type x guard (E pack 2nd variant) with a tapered tang and this also has 17.

How very odd that the one T.W. has on his site has 19. Nice dagger actually.

John, do you still collect heer daggers or have your interests shifted?

War is when your government tells you who the enemy is.
Revolution is when you figure it out for yourself.