AF Leased the then F-WTSC from Aerospatiale, eventually buying it outright in I think round 1980, but it was re-registered as F-BTSC in May 1975, according to the info I have, in that case it would have been F-WTSC for only 4 months, having first flown in this guise in Jan 1975.
leased 214, as G-BFKW in 1980, in early 1981 it joined BA
outright as G-BOAG.
(Which is how 216, flying for the first time a year later than 214, ended up as G-BOAF
in 1980, originally having the BAe reg G-BFKX, when leased to BA
it was G-N94AF for the Braniff operated leg between IAD