if you want a quick solution, buy the cheapest ball pen replacement refills . with a fine tip plier press the metal tip of the refills above the ball and squeeze gently until the ball comes out. a bit messy because of the ink.... clean them in a solution ands voila! they fit the hole on your sea 300. very often the spring are still in the holes. if not , wiggle your bezel as straight as possible on top of the balls and snap it in. most of the times one will come out again , but 2 stay and the ratchet function is restored. if not satisfied, repeat. if you want it properly, Archer gave you the numbers. good luck ! kind regards. Achim
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