There was a PL700B sold on ebay that was evidently standing on its transformer when the basement flooded. The water came halfway up the lower meter face by virtue of a rust stain across the meter lens, so we assume the transformer was completely underwater for an undetermined amount of time.
This thread was started by the buyer and we now have a new member in addition to a rescued PL700B.
Oh, and it seems your heart procedure was successful... Congratulations!