The Sailor Fountain Pen

Sailor fountain pen was a gift from my mum, whose friend got it for her when she was in japan. What makes this pen extra special for me is that i just can't find anything about it. Is it a profit junior? A compass? A japan store exclusive? Probably all of the above. I think i found a listing for it on a tie an wenes store once, but i haven't been able to find it again. But every time i write with it, i enjoy the element of mystery.