Abstract: A seatback assembly including a frame exhibiting a side-disposed and arcuate edge. An arm is pivotally secured to the frame. A pawl is in turn pivotally secured to the arm and is biased in engaging fashion relative to the arcuate extending edge via alternating and mating teeth and recess configurations established between the pawl and along at least one of first and second spaced apart locations defined along the arcuate edge. A cam is mounted to a further location of the seatback arm and biases the pawl against the frame. The cam is actuated to cause the pawl to disengage from the first configured sector location, the seatback arm pivoting towards the seat frame, whereupon the pawl matingly engages the second location along the arcuate seat sector edge to lock the seatback in a forwardly rotated and stowed position relative to the seat frame.