They look very much like pictures I took and posted years ago. The 3L03 you refer to and similar code is only seen printed on new dealership provided baskets. Never been able to fathom what it means but likely a code that lets Suzuki know if a returned part is the one they supplied. Its not on all of them or washes off after a while in the engine oil. Never see it on the used baskets that turn up here for rebuild. Three baskets queuing here for work don't have it.
The 05G37 is cast into the die casting of all baskets. Simply the manufacturers part number for the casting (which is not actually Suzuki). If its followed by the number 2 cast in an inch so after then its the revised, slightly improved casting. Has slightly smaller slots for the springs on its back so the plate that keeps the springs in does not move quite so far. Its that plate slapping about that causes all the trouble. Clatter at idle and vibration while riding. Any movement is a problem so not a major improvement if that's why they did it.
Are you asking for any particular reason? I can did out old pictures to explain this or exactly what you might be after. There are later revisions perhaps more relevant.