Hi Austin, Magnavox was the only company to make the cam sensors. you have a gen 1 (made in the USA) and a gen 2 (made in Mexico) drive unit.
the gen 2 mexico unit with the phillips screw does not look to have touched yet.
the gen 1 drive doesn't look to have the correct washers, top end or bottom end (and can't see wave washer). also gen 1 unit has what appears to be RJC's repair kit installed.
Cam Sensor Repair Kit
Kirbans sells the RJC kit as well - part # 7235.
1985 1986 1987 Buick Grand National T Type Turbo GNX 3.8L CAM SENSOR REPAIR KIT
the above repair kits are to fix a broken tab used to index the interrupter ring.
The RJC repair kit is not to be confused with the complete rebuild kit that
@turbo nasty produces.
as noted by Remove before Flight in other threads, TA Performance has the gear: Product ID
: TA_1402A
Gen 1 units were produced in the USA thru at least 1998 and probably into the early 2000s. the gen 1 date code of 4297 could be 1984 or 1994, the 297th day. the gen 2 unit date code of 3171 is 2003, the 171st day. unit specs were the same, only difference being the added ink of assembled in Mexico. don't know if differences seen in that gen 1 unit is the result of someone working on previously to install that RJC repair kit and do whatever else...