Early Twist Grip Body Design Question

[WillH]

Does anyone know the thinking/purpose behind the step in the milled helical pin groove in the early twist grip body/sleeve. It's pictured on page 29 (Simplex 125 Parts Catalog) lower right. Also picture attached. The one pictured rolls toward the rider to pull the cable; I have one that rolls away from the rider to pull the cable; just opposite of what I would thing was right; what is that about.

[Mike Sal]

is your grip on the left side or right side of the handlebar.  I was thinking some of the early stuff had the compression release incorporated into the grip.
Mike Sal

[Ricks]

Will, what year is this bike?  During the war, Simplex built some bikes that had the throttle on the left, and the compression release on the right.  This was to facilitate shooting with your right hand if necessary.

Tom, KartJockey, has a 1948 that the throttle is opposite of the standard rotation.  I wonder if this was normal back then.  If not, can the rotatable tube go on the opposite way to change the rotation?

[Jason Smith]

I have some bars that are in rough shape that I was going to send out to be dipped that have the twist mechanism on the left.

[Ricks]

Right side twist is throttle, the left side twist is the compression release.