Good morning

I am looking for identification of a small German naval tug, noted as built in Germany 1941, which in 1946 became a Norwegian naval tug.I believe the tug was a war compensation. I have no building yard or name when German, but in 1946 she was renamed TROLL and was stationed in Horten. From 1961 transferred to Marinens Hovedverft, Horten, renamed OLE JACOB. In 1975 bought by Leif Gjerver, Horten. Same name. Later that year, sold to Star Buksering A/S, Porsgrunn. Rebuilt and new engine installed in 1977, renamed PORS. She is now measured 63grt. L20,2m x B6,2m x D2,7m. One Deutz diesel 750 BHK.From 1979 owned by Bukser & Bjergningsselskapet A/S, Oslo, and owned by them until 1982. After 1982 several Norwegian owners, still named PORS. Anybody who have some information about her German past? If anybody should be interested, I have a good photos of her as OLE JACOB and PORS.Best regards Terje Nilsen