Mine needs new finish
I have the same model that needs a new finish job on it.
I agree that it is a 1993 model. That pin seams to be an indication of a 93.
I have seen 3 or 4 and never could fine anything about them. I even e-mailed Evan, but no answer.
Mine came with a shaft like yours, Most the 93 shafts came with engrave rings. I got an engraved one for mine and it has a better fit for sure.
I wish I new what to do on refinish, send it to Schon. I heard they will change butt cap. Is that true.
Like to know more my self,
Jeff