That is a strange S/N.
I have been "collecting" Starcraft S/N's for a while, just to help determine the build year. To date, all but 1 have been 6 digit numbers. (the 7 digit is a 1 million number from 1972)
However, if I ignore the 6 at the left, then the number, 925849, fits in the other numbers for 1969. For example, I have 920195 as a 1969, and 941006 and 941384 as 1970's.
We have a SS16 with 959321 that I believe is a 1970.
That said, when finished, this will be a nice fishing boat.