As I look through my early rosters, I cannot find evidence that this was a Frisco locomotive. Although it is possible it was one of the 1903-1905 Baldwin ten-wheelers. Still looking.
The tender looks totally Harriman so it could be a replacement of a more standard small rectangular one. I think it looks great.
The Frisco 479-484 class ten-wheelers, Baldwin 1910, were delivered with “Vanderbilt” tenders. However, the tender on this locomotive appears to be smaller than the tenders from the SLSF 479-484 class locomotives.