On 29 May, 14:28, "Colin McKenzie" wrote:
On Sat, 29 May 2010 13:45:19 +0100, MIG *
wrote:

My memory is that the whole fleets of 1972 mark 1 and 1972 mark 2
stock were already running on the Northern line alongside 1938 stock
while the 1959 stock was just starting to be displaced by 1973 stock
being introduced on the Piccadilly, and moving over to replace the
rest of the 1938 stock (and the 1972 mark 2 stock eventually).

And my memory, FWIW, is that the 73 stock was introduced in about 1975, *
not 1973.

Yes it was. And the 1972 mark 2 first introduced in late 1973 (and
all in service by some time in 1974 according to a source I found
since).



Since tube stock seems to be good for at least 40 years' service, I don't *
suppose the world would end if they delayed replacing the 73 for 5 years *
(from now).

A stock still going strong and will be very sadly missed. I sometimes
hear normals talking about the nice, comfortable train they caught
between Kings Cross and Baker Street or wherever. It's not just an
enthusiast thing.

LU stock seemed a lot more interchangeable then, swapping between
lines quite often. Nowadays it seems as if it's always purpose built
for a specific line and signalling system.