the 20. century see some "invasions" of schools of tuna into the north sea which is not realy the biotope for this large fisch that like the mediterranean. https://www.youtube.com/watch?v=oZc85P_ngi8

they came for whatever reason into the north sea from time to time like
here on the fish market Hamburg/Altona in 1931

http://www.fischmagazin.de/willkommen-bild-anzeige-seriennummer-3424.htm

Kongsberg Jarmann gun for sale http://www.lauritz.com/da/auktion/kongsb...igin/i4511950/#

that was used by two danish fisherman from Esbjerg on the danish nort sea coast who make the tour to greenland from 1948 -50. but from 1950 to 1954 they catch tuna in the north sea with this harpoon gun that was probably bought years before as a special tool for the summer trip to greenland.

green's say the tuna was eridicated I say he was gone back were he was coming before

the 1949 Raufoss ammo ammo is soft soldered in tins like Kynoch DR cartridges not for tropical but for the rough northern maritime climate

the right wallhanger for a summer house behind the dunes