Yes, definitely, there were distinct signs, I can even recognize them in my NPD friends, eg. when you start talking about yourself, something that happened to you, your feelings, etc. their attention would start drifting...they would try to switch the subject as if your reality bores them.
They would get angry over tiny matters, and have an angry outburst/tantrum like a baby.
I didn't know about PDs for the longest time, I just thought they are all ordinary but difficult people.
My N husband finally opened my eyes, in a way that not even my N stepmother did. I experienced the full deluge of symptoms, eg. gaslighting, denial and distortion of facts, NI, Devaluation,...and my own symptoms as a victim, severe depression, etc., finally led me to do my own research, and then the fog lifted and the pattern clarified itself.
He is still gaslighting me, claiming that It was *I* who is the Narcissist, and he the victim of my vindictiveness.