Including the seal directly above the unit, its officially called a Sender and Pump Assembly. There were 3 Finis codes, depending on manufacturing date.
01/06/1997 to 15/01/1999 - Finis 1053379
15/01/1999 to 15/02/2000 - Finis 1093855
15/02/2000 to 11/12/2001 - Finis 1112051