London Underground C69 and C77 Stock
Numbering

Formation
Formation
Reversible units
Reversible units
Notes
Formation
Formation
5xxx (DM)
6xxx (UT)
Notes
Numbers
C69
5501 : 5606
6501 : 6606(1)
5585(1) destroyed in 1975. 5505 partly destroyed in 2005 - rebuilt as 5606(2) 6505 renumbered 6606(2) in 2008
Numbers
C77
5701 : 5733
6701 : 6733
6713 partly destroyed in 2005 - rebuilt as 6734 5713 renumbered 5734 in 2008.
Numbers
C08
-
6606(2) 6734
-

Question: What were the remains of the London Underground C69 and C77 Stock used for in which new cars?
Answer: The remains were used in the building of new cars 6606 (the second car with this number) and 6734.