Mike, Ned and Skid, thanks for all the info.
Mike, please post any more photos you have of tuna 500s. Do you have a photo of the ex-Danish Air Force 500M being used on tuna work now, still in it's camouflage?
Skid, don't worry about any lack of action in your photos. It is great to see colour photos of many of the helicopters that feature in B&W in Rex Forrseter's book. If you have more photos from the peak of the venison days, please post them.
Thanks.