The first run reels of the SSm design, contained a crosswind block with an extra hole drilled in the upper center of the groove where the reel shaft sits, which screwed directly into the shaft itself. This design was unstable, putting too much pressure on the shaft. Newer versions of the reel will contain the original design from the older SS reels: the crosswind block with crosswind plate, secured with two screws.
Notes For Ordering
If you are replacing the older 43-750M crosswind block (with extra hole and single screw) with the 43N-750M block, you will also need to order the 43A-750 Crosswind Block Plate and 44-750 Crosswind Block Screw (2 Required).
This applies to the 650SSm, 750SSm, 850SSm