Pakistan Defence

Its my third thread of this kind. Previous two:
http://www.defence.pk/forums/military-forum/164168-worlds-most-mass-produced-aircrafts.html
http://www.defence.pk/forums/military-forum/165406-worlds-most-mass-produced-tanks.html

1. Type VII



709 built. WW2 German submarine. First by a laaarge margin.

2. Type IX



283 built. Another German WW2 submarine.

3. Project 613 Whiskey



236 built (including 21 in China). Most produced post WW2 submarine. Most produced Soviet submarine.

4. Poject 633 Romeo



133 built, including 84 in China. That's most produced submarine by China, although designed in USSR.

5. Balao



128 built. Most produced US submarine (WW2).

6. Type XXI



118 built. Third most produced German WW2 submarine. Ironically none seen action.

7. Type A Ko-hyoteki



101 built. Most produced Japanese submarine. Most produced midget submarine.

8. UB-III



95 built. Most produced WW1 submarine (German).