Revell and a Submarine!
The Sub in question was the German " Wolf Pack" W.W.2. I believe It was a 7-C.You know Gunther Prien's sub with the interior. When I was building mine way back then, I got the Clear Panel Bug. Yup! I took another sub a friend had (Same type of Boat) That didn't have the interior. I took the side that was cut away on the revell sub and made a whole clear section for the formally open side!
Then, I took ALL the Bulkhead and Deck portions to make it more authentic. You know what? She came out way better than I thought.