The John Zimmermann & Sons, Inc. records series is the largest, and covers the company's founding in 1919 to its sale in 1963. The series has been organized into nine subseries: Board of directors meeting minutes; Agreements; Machinery inventories; Ledgers; Balance sheets; Taxes; Pension and profit-sharing; Sale; and Relia and technical drawings.

The board of directors meeting minutes subseries consists of typescripts of meeting minutes that include the articles of incorporation and by-laws. The materials have been removed from binders for preservation purposes. The meeting minutes date from 1919 to 1963.

The Agreements subseries includes license agreements, a plumber work contract, a loom sales contract, stock purchase plans, and termination of a stock agreement. There is documentation of the transfer of Albert Zimmermanns's trusts directly to his children. Of note is correspondence between James A. Fligg, Richard C. Kelley, and William Zimmermann related to a disagreement over a decision made by the board of directors, as well as Fligg's absence from a meeting, subsequent leave of absence, and eventual resignation in 1946.

The Machinery inventories subseries consists of two sets of large inventories of the company's machinery dated 1932 and 1933.

The Ledgers subseries consists of fifteen handwritten volumes documenting various financial aspects of the business. The Accounts A-Z ledgers are an alphabetical listing of expenses and credits within a specific period; the three ledgers cover the entire span of the business. The cash books record the cash transactions of the business between 1919 and 1931. Time book/salaries ledgers record hours worked by employees for the week and wages paid from 1919 to January 1924, and 1926 to 1937. The journal ledger records accounts payable and accounts receivable transactions in chronological order from December 1962 to December 1963.

The Balance sheets subseries consists of summaries of financial balances of the company from 1933 to 1964. The balance sheet sometimes accompanies an auditor's report from a Certified Public Accountant (CPA) as an assurance that the information is accurate. There are a small number of textile business graphs, charts, and notes related to sales analysis and accounting procedures.

The Taxes subseries consists of state, city, and federal taxes between 1919 and 1945. These were retained because they span the years before, during, and after the Great Depression. The returns may be of interest more because they show how the company's finances were reported, rather than for the status of said finances, which is heavily documented in the ledgers, balance sheets, and pension and profit-sharing materials.

The Pension and profit-sharing subseries consists of pension studies, retirement plans, and profit-sharing documentation. John Zimmermann & Sons entered into an agreement with the Plush Workers Union that included an incentive plan wherein the employees' regular salary and bonuses were dependent on the company's profitability. There are profit-sharing annual statements, committee notes, correspondence, and employee final values index cards. (See the J-Z, Inc. series for pay-out and transition during the sale of the company.) There is also an employee wages ledger dating from 1958 to 1961.

The Sale subseries documents the lead-up to William Zimmermann's retirement, including correspondence with Zimmermann with proposals of buyers, correspondence with Merion Securities, a report about the future of the business, and the sales agreement with Merion Securities. The materials date from 1962 to 1965.

The Relia and technical drawings subseries consists of two company seals, a stamp, and five technical drawings of looms from the Art Loom Rug Mills.