BALTIMORE, SEPT. 7 -- Key financial records covering the secret sale of arms to Iran and supply of materiel to the Nicaraguan contra rebels that were provided in 1987 to the congressional Iran-contra investigating committees were not complete, according to testimony yesterday at the trial here of a former CIA official involved in the affair.

"A consolidation of different ledgers" led to alterations and "some expense accounts that once were shown one way were now shown another," according to Willard I. Zucker, manager of the Swiss money management firm Compagnie de Services Fiduciaries (CSF).

CSF, a Geneva-based organization, was used by retired major general Richard V. Secord to handle the funds generated to run the covert operation set up in 1984 by then-White House aide Oliver L. North.

The CSF-generated financial records of the "enterprise", a name given the North operation, were turned over to the congressional committees in early 1987 by Secord's business partner in the operation, Albert Hakim.

Zucker said he could not estimate what differences existed between the original ledgers and the "consolidated" documents released to the congressional committees. He said he learned in early 1987 that Hakim in December 1986, in the wake of public disclosure of the Iran-contra affair, had requested that CSF prepare "a revised statement of accounts."

A quick review showed that in one instance, a Feb. 7, 1986, payment to Secord of $165,000, described by Zucker as a distribution of profits, was not included in a ledger for that date released by the committees. In another instance, a $240,000 profit-distribution payment in mid-April 1985 to a principal in the first arms sale to the contras also apparently was not included.

Zucker was the second witness for prosecutors from the office of independent counsel Lawrence E. Walsh in the Iran-contra trial of Thomas G. Clines. Clines has been charged with filing false federal income taxes in 1985 and 1986 because he allegedly failed to include all the money he earned from working for the North enterprise.

Zucker's testimony yesterday was important to the prosecution because Secord, the first government witness, volunteered from the witness stand that he believed some CSF financial records he had seen were "falsified."

Since part of the case against Clines is based on CSF financial records, Zucker's description yesterday that the documents shown him were original, unaltered CSF documents was used to counter Secord's remarks.

For example, CSF documents introduced yesterday by the prosecution were used to indicate that Clines in July 1985 took in cash $206,090 of his $301,966 profit from one arms shipment.