Well, I don't know if he had one with him. What Jim Swain said was, "I randomly picked one that was running 8 lbs 14 oz.," which does sound like he was looking at basses that were already made and that he had several to pick from. Now, he could have been looking at stock online that listed several by weight. Total speculation on my part. This message from him was July 6 so a little more than 3 weeks.
I seriously could not have resisted that bass. I'm a p-bass guy but know at some point I'd like to have a Jazz. That would have been the Jazz. Big Congratulations!!! I will now commence to looking for its twin. Thank you for the GAS.