Stickleback (1954), Shrimp (1954), Sprat (1955), Minnow (1955)
Scale: 1:8. A plan showing the sections as fitted, of Stickleback (1954) (ex-X 51), Shrimp (1954) (ex-X 52), Sprat (1955) (ex-X 53) and Minnow (ex-X 54), Stickleback class midget submarines.