Water Pump driver shaft o rings ?

[Warren Seale]

Are the front (water pump side) and the rear (timing chain side) o- rings of the water pump drive shaft the same? The pump appears to have one already on its splined input shaft. Is that one of them?
Thanks

Warren
96 T/A,WS6,M6
79 T/A,WS6,A3,403
72 442,W30,A3

[Rob B (shoebox)]

All correct.