Bang seat handles on the Victor
I was on 55 1966/69 and remember the seat well.
There were two handles one above your head and another between the thighs. It was suggested to use the lower handle in a hurry but the upper if it was a premeditate ejection because the posture created reduced the severity of the inevitable back injuries.
The seat was designed when we wore flying suits only and when immersion suits with thick fleece inner overalls were issued the availability of the lower handle was reduced
I suppose a longer handle might have been introduced earlier but so might a great many of other improvements.