According to John Titor the C204 manufactured by General Electric in 2034 was capable of "The C204 unit is accurate from 50 to 60 years a jump and travels at about 10 years an hour at 100% power." That means it is going 24X365X10 = 87600X normal speed.
In one HDR time travel experiment the watch was moving about 5 hours per second or about 60X60X5 = 18,000X normal speed, so the C204 is faster than the HDR.
Steven Gibbs HDR is thus not as fast as the GE C204 used by John Titor. Also, according to CarlosX the limit of time travel with the HDR is 500 years forward or backward, versus John Titor says that the C204 has a limit of 60 years or you have massive percent divergence.