First year of AeroDynic 22 ?

I got a 22 series A1 with 1195 bulbs and bayonet system.
Also with unpainted frame inside, onle black on outside.
I guess the an earlier version.
And motor is marked with #8422B111-25 and ´78.

In our timeline model 22 is listed with first production year 1982.
My mini aero is in really good shape for a 46 years old light, so my question.

 

[Maxim2Eng]

Easiest way to ID an early AeroDynic is the speaker cover…the slots on the top two rows will be continuous across the front. It was discovered that this caused the speaker housing to become an air dam and reduce a vehicle’s top speed. It was modified to have a few slots on either end.

 

[shues]

The 22 has no speaker section; it's the mini Aerodynic.