The fact that figures are included seems to indicate it was probably a mid-period production ---the first release included three figures, including a driver; IIRC, the last release (included as part of the Iron Horse package, paired with an SdKfz 222 armored car) included no figures at all...
but that's just a bit of Sherlock-style speculation...
BTW, even though you had to look hard to find him where he sat behind the wheel, I was disappointed when the second round of releases omitted the driver...