"All of the early D-2 calls were made from compressed hard rubber," Jackson said when asked about this modification.
"Up until 1939, the call had a round hole in the end," Jackson said, continuing the D-2's early history.
Jackson said modification of the D-2 began early in production.
Two of the biggest states in terms of days hunted by a population and number of ducks harvested every year are Arkansas and Louisiana, so it didn't take the D-2 long to find its way down the river into the region.
For many years the Olt D-2 was a guarded secret of the best duck hunters, especially in Arkansas' famed public woods.
Jim Ronquest of Rich-N-Tone calls in Stuttgart, started hunting with a D-2 as a young boy, learning the skills that would make him a future World Champion caller.
Rich-N-Tone recently started manufacturing its version of the Cutdown D-2, called the DC Mondo.
"A modified Olt D-2 has a lower pitch than a standard call and I think it carries better in any conditions.
One of the first call makers to replicate the cutdown D-2's is Black Ops Calls based in Benton.
3: When X-1 passes to X-2 behind the goal, D-2 must move back to cover the receiver, while M-2 must move over to replace D-2 in the rectangle.
4: When X-1 runs the ball to the other side of the goal, D-3 must pick him up, while the other defenders rotate as shown to maintain the rectangle -- D-2 sliding to the M-2 corner, M-2 sliding to the M-1 corner, M-1 sliding to M-3, and M-3 sliding to D-3.