Which HP calculator had "The New Accuracy" first?

[Joe Horn]

HP-91 or HP-22?

Background: Dennis Harm's article "The New Accuracy: Making 2^3=8" (HP Journal, October 1976, pages 16-17) explains why the original HP calculators get 8.000000003 for 2^3, and how the HP-91 (and later models) get exactly 8.

This implies that the HP-91 was the first HP calculator to have "the new accuracy". The HP-91 was introduced in March 1976. However, the CCE33 emulator of the HP-22 also gets exactly 8 for 2^3, and the HP-22 was introduced in September 1975 (only one month after the HP-25, which returns 8.000000003 for 2^3). Is the CCE33 emulator of the HP-22 faulty (I don't see how that's possible, since it uses the original HP microcode), or was the HP-22 the first calculator with "the new accuracy"?

Request: If you own a real, physical HP-22 that is working, please calculate 2^3 on it, then press Shift 9, and tell us what is displayed. Thanks!