By contrast I have a pic of me and some mates, taken in March '56, on the line, in just pe. shorts and plimsolls.
Sylt could be rather chilly in February. We were issued with ww2 flying suits made from canvas! Far too bulky to work in. Then we were given kapok filled jackets and trousers. Rumour had it they were from the Korean war.(Chinese?) they did keep one nice and warm.