At one point I believe they had the biggest (working) fleet of Electras in the world and I think they had nine at the time
To my memory 7 was the most that had a valid CofA at any one time Usually at least 1 would be in on check. But I'm sure someone will be along in a moment to correct me...
[Spotter mode] The largest fleet would have been LOFB, LOFC, LOFD, LOFE, FIJR, FIJV and the odd prop FIZU [/spotter mode]
LOFA had gone to corrosion by the time the ex hunting beasts with new fangled contraptions like proper artificial horizons and an APU arrived.
There were a few others kicking about at Cov, the ex-olson ones became FF FG and FH for registry reasons at one point.