According to the Sparkman & Stephens website, the design carried 750 pounds of internal ballast, thus raising the total from 9,250 to 10,000 pounds, and the designed ballast/displacement ratio to 40%.
As was the case with many boats built in this time period, actual displacements are reported to exceed designed displacement. I've heard of Seafarer/Sailmaster 45 yawls weighing ~28,000 pounds on the lift.
All the best,
So the listed total ballast is actually 10,000 lbs.?
For reasons of consistency, I have to stick to dimensions on a plan or brochure. I understand what you are saying about actual specs varying from those published by a designer or builder. This is especially true with rig dimensions. But I have made the decision to stick with the latter only since this is all I have to go on that can considered verifiable. In 99.9 % of the cases, if I don't have a listed number for something, I leave it out. If a subsequent published dimension is different from an earlier one, I try to make a note of it.