ISLAMABAD, Pakistan, Sept. 2—A 23‐year‐old Dutch tourist, arrested last February for taking photographs outside a Pakistani air base, has been convicted of spying after a secret trial and sentenced to two years imprisonment, newspapers reported yesterday.

Diplomatic sources said that the form in which the trial was conducted implied that Pakistan suspected the Netherlands Government of involvement in the alleged spying.

The trial was reportedly held under a provision of a British colonial law, the Enemy Agents Act of 1943. Pakistan, a member of the British Commonwealth, was formerly part of British India and was formed after that territory received independence.

The defendant, Albert Jacob Walg, a student, was arrested on Feb. 17 near Karachi Airport after supposedly having photographed Pakistani aircraft.

Following his arrest, nine fellow students at the University of Amsterdam set' a letter in his defense, saying that Mr. Walg had been a collector of models and photographs of airplanes for years and that practicing his hobby ought not to be interpreted as spying.

Charges Were Withheld

Successive requests by the Dutch consulate to obtain legal relief for Mr. Walg were rejected and no consular officials were permitted to attend the secret trial.

Netherlands officials were not permitted to know the character of the evidence or the charges brought by the Pakistan Government, nor had they been officially informed by today of the trial's result.

Attempts by a Pakistani lawyer to arrange bail for Mr. Walg pending trial were rejected. The case was continually postponed until some time last month.

Mr. Walg reportedly has not been permitted to send letters to his fiancee, his, family or friends in the Netherlands.

Old U.S. Transports

The only Pakistan Air Force planes normally visible at Karachi Airport are United States built C‐130 transports of the type the army has used to supply its occupation troops in East Pakistan since March.

Pakistan air force headquarters are at Peshawar, in the northern part of the country, and many of the nation's tactical aircraft are based there. The air force's main tactical strength is composed of obsolete or obsolescent Soviet and American craft.

The Netherlands is a member of the international consortium on which Pakistan is heavily dependent for foreign aid. The annual Dutch contribution is usually about $4.4‐million.