They call it "dual adjustable drag," but really it is a dual-
arm click-"drag"/check. In use, a coil-spring powered single-pawl check as ever. This later configuration came about as LHW became the predominant mode--late 80s and then 90s. The original single arm design as manufactured favored RHW, and was "good enough," but not ideal as the arm's position and resistance relative to the pawl still favors RHW even if the pawl is flipped. Only the aysmmetrical pawl--by flipping it--could be changed to optimum LHW. If the single-arm design were produced by retooling for mirror image orientation, that would suit the LHW mode that became prevalent. But then the RHW swap would be make-do.
The dual-arm gives the same mechanical advantage if the pawl is oriented correctly and the correct arm chosen. As with most symmetrical check flat, leaf spring arrangements, this coil spring design is intended for use with one pawl engaged. On a rare occasion, both pawls could be engaged for greater pay resistance, but at the expense of increased wear and greater winding resistance. So this arrangement is "symmetrical" in the load that either arm will place on the pawl in wind or in pay. I suppose they could have done that with an identical mirror image separate arm, but that would necessitate a separate adjustor knob and cam for each arm.
Wow, good to mention the Trophy series, related in parts and design. The M 6 and 8 wouldn't draw much special notice, being just another of an excellent family of USA made reels--industrial chic from budget price on up.
Trophy:
viewtopic.php?f=4&t=13561&hilit=dual+pawl#p83552The dual-arm set up was also used in the machined series of reels.
LM/Browning Strata:
viewtopic.php?f=4&t=17769&hilit=innovations+Strata