Daryl,
Well, from the last set of pics…I really don’t see any obvious clues as to what mechanism is being used to provide the power for the easy opening system.
Legit “self” openers usually have to have a camming system or some type of spring system (ie ejectors, etc) to provide the self opening or easy opener power.
If this is indeed an easy opener…the power would have to come from the cocking levers I would guess. Pics of the lockwork/internals etc would be nice.