There were a number of paint schemes for submarines-
http://www.shipcamouflage.com/s_class.htm
It appears the MS9 paint scheme (black) was in use starting January 41 and used until 1943-
http://www.shipcamouflage.com/measure_9.htm
The Jan 41 measures are here-
http://www.shipcamouflage.com/ships2...f_contents.htm
Lot's of great historical stuff on that website!
Yours, Mike