Open the gun and listen for a 'click' coming from the locks before the gun is fully open. Watching the triggers as you open the gun might show this too. Otherwise, pull the locks off and have a look.

The only doubles I have with intercepting sears are hammer-guns, presuming it is the same for hammerless.

A couple of mine have intercepting safeties, different mechanism altogether but same function. No second 'click' with intercepting safeties.