Sea Wolf was released in March 1976 in North America.
10,000 units were made. This is one of the all time greats. The whole game is played through a big periscope. This particular game is based on a much earlier electromechanical game from Sega (called "Periscope
"), which was the first game ever to require 25 cents per play (a price the industry has been trying to raise for years now, an effort which has only been partially successful, despite over a decade of games requiring 50 cents or more. People just still expect for games to cost a quarter).
The current world record holder for Sea Wolf is Alan Radue with a score of 11,300 points. The record was set on October 2, 2011 at the Tranquility Base Arcade and verified by Twin Galaxies International on October 9, 2011.
The game was imported in Germany by Wullf-Automaten GmbH, an official Midway Importer of these times.