Lancaster JB659 OF-J

Last year, Avro Lancaster JB659, which crashed in Holland during WW2, was salvaged from its crashsite. The killed RAF flyers were burried, a small monument at the crashsite was erected and some parts of the aircraft were donated to various organisations. The recently reopend CRASH Airwar museum, received some parts and relics. Among those is a parachute harnass which has the logo “Observer” printed on it. The question we would liked to be answered is : why was it marked “Observer”. Had in the Lancaster every crewmember a diffirent type of chute , or is there some other reason ? A photo of the chute can be found on the site: http://www.crash40-45.nl The chute is the last picture, found when looking at the “museum” part of the site