I'm trying to get the specifics on my head's history.  It's a 1987 2203, with the serial code labeled S/A.  However, the sticker has hand-written specs saying:

Model: 2203

Power: 100 W

Power Input: 375 W

As far as I know, "S/A" models are 50 W.  But how come mine says it could be 100 W?