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The M3 Lee is on the Lahore Army Museum. The markings are from 1st Armoured Division
There is other Photo below, there is a plate in front of the vehicle, but only a local can go and read it.
You can check at page 4 of:
http://the.shadock.free.fr/Surviving_Lee_Grant.pdf
It was no "Lancer", it was a local modification of M3 chassis.
In 1971 it was not in service, because I have seen Army reports of the fighting, and they talked that "the remaining old 17 Pounder towed guns" were at the West.
Thanks