Simmons also made a varmint/target scope with a left side windage knob, I think MuleDeer has one or did have one anyway.

On a side note as a lefty shooter I appreciate right side windage knobs... grin

Will Munny: It's a hell of a thing, killing a man. Take away all he's got and all he's ever gonna have.

The Schofield Kid: Yeah, well, I guess they had it coming.

Will Munny: We all got it coming, kid.