OK you older (like me) Bristow guys. In the 1970s and 1980s, many of the S-61s had the oil company's logo on them. Some aircraft started off with one oil company in one place then moved to Gt Yarmouth or Sumburgh or Unst, some were traded against 332Ls and some ended up in Malaysia with MHS.
I am trying to remember which aircraft displayed or was contracted to which oil company. A trawl through the logbook has thrown up these matches but you maybe able to fill in the gaps and add more information, with a photo if possible!
G-AZNE ?
G-AZDC Mobil
G-AZRF BP
G-BAKA Texaco (Tartan)
G-BAKB Britoil (mainly Beatrice)
G-BAKC Chevron (Unst)
G-BBGS Mobil
G-BBHL BP
G-BBHM BP
G-BBHN ? (Ditched)
G-BBVA Amoco (Montrose)
G-BBVB BP
G-BCLA Amoco
G-BCLC ? Then Shell Southern North Sea 1983 Then SAR?
G-BCLD Hamilton Brothers (TW58)
G-BDII Mobil?
G-BDIJ Phillips
G-BFRI Chevron (Unst)
G-BGWJ Britoil?
G-BGWK ?
G-BHOF BP
G-BHOG ?
G-BHOH BP then Shell Southern North Sea in 1983