Probably 2002, because they weren't making SRIII's in 1992, I think they were still making SR2's until 1993.
The second number in a GE date code is the last digit of the year it was made.
I don't know what the letters at the end stand for; my guess is it would be the location or factory where the SRIII was made.
Mine has a '5' as the second number, and a 'C' at the end, so it was made in 1995. I know it was made in China, so whether the 'C' on mine designates China, or a specific factory in China, I don't know.
Mine works very well. Some SRIII's apparently were lemons, mine is as good or better than an SR2. A lot of it is alignment at the factory, but also the value of the resistor that goes from the IF amp to the antenna coil (and RF amp transistor) can make a difference in performance, not only in sensitivity, but selectivity also.
GE changed the value of these resistors now and then, even within models.