T-Bills Futures were traded on the CME. Each contract was for 1000000 multiplied by the T-Bills . Prices were quoted in Index Points.
T-Bills Futures contracts existed for the months of March (H), June (M), September (U) and December (Z). The deliverable product for the T-Bills Futures contract was None; this contract was cash-settled based on the highest discount rate accepted in the U.S. Treasury Department's 91-day U.S. Treasury bill auction in the week of the third Wednesday of the contract month..
Click on any price shown on this page to see a time series of the underlying data, along with options for graphing, downloading and validating the data.
Quandl's explanatory page About Futures Contracts.