Locating an Apogee's Serial Number:
All serial number are located on the back of the unit.
The first Beta and Gamma units had white sticker and was located some where on the back starting with G22-xxxx or G23-xxxx.
Delta and late Gamma unit will have etched plate with the serial number located on the back. These Start with D23-xxxx
Model Differences
G22- Beta
These are the fist units released and featured early hardware internally.
G23-Gamma
These have changes in hardware and design inside the case, still uses the same mounting bracket released with G22 series.
D23-Delta
These units have have a new physical look. It has redesigned case. sliming down, and weight reduction.
*Note: If this unit replaces a G22 or G23 models, a new bracket must be requested with the replacement.