I see a contradiction on the Museum's site. This is what it says .. (extracts only ) :
FALSIFYING THE INDIAN CLAIMS
It has been widely propagated and falsely believed that 93,000 officers and men of Pakistan Armed Forces surrendered in East Pakistan. Nothing could be far from the reality.
After considerable attrition in about ten months of fighting, the total number of army persons who surrendered in East Pakistan could not be more than 32,000 by any calculation. There were hardly about 8,000 – 10,000 more people in different categories like Scouts, Mujahids and civilians. The local force viz East Pakistan Civil Armed Forces (EPCAF), raised to replace the East Pakistan Rifles, comprised of locals mainly non-Bengalis, who joined their families as the war ended. As regards civilians, there were a very small number of senior bureaucrats, the junior lot being the locals. As far as civilian families are concerned there were hardly any because they had already been shifted to their native areas during the period of turmoil.
How this figure of 93,000 was concocted and what were the motives can be judged from the fact that India took two weeks to pick up these prisoners from different parts of East Pakistan.
Pakistan Army has also been falsely charged with heinous atrocities in East Pakistan during 1971. An impartial observer must count the number of non-Bengalis living in East Pakistan on 1 February 1971 and as to how many were left after two months i.e. by the end of April 1971 when the Army managed to restore some order in the area and as to what had happened to the rest. Pakistan Army, comprising of about 30,000 men including some reinforcements that had been flown by air, was tasked to restore normalcy.
A force could never have stooped so low as to indulge in any immoral and tyrannical acts. Pakistan Army had been brought up and trained in the noblest traditions of Islam. Friends and foes alike had been all admiration for their conduct, discipline, courage, bravery, moral and ethical attributes and strength of character.
To sum up, the total strength of the Pakistani prisoners in Indian camps was not more than 40,000. In this, about 30,000 to 32,000 belonged to Pakistan Army, about 5,000 – 6,000 were from the Civil Armed Forces i.e. three Scouts and four Rangers wings, two Mujahid battalions, a small number of Air Force, Naval and Police elements and very few civilians.
The figure of 93,000 was concocted simply to defame and demoralize Pakistan Army. Their repatriation to their homeland was spread over about eight months making sure that the personnel of those units who served in East Pakistan could not get together. Repatriation of huge numbers of prisoners was trumpeted to deceive people and claim undue glory for the Indian Invaders.
If the above were true, why would Govt of Pakistan issue this postage stamp in 1972 ?