Selection of device version
I can find the following information on my current device:
1.) Print on front panel
The front panel shows "8021GPS"
2.) Nameplate on the top of the housing
The nameplate (to be found on the housing cover) shows a serial number (S/N) < 20000.
1.) Print on front panel
The front panel shows "8024GPS"
2.) Nameplate on the top of the housing
The nameplate (to be found on the housing cover) shows a serial number (S/N) ≥ 20000 and also the identification (ID) "V2".