The person who installed the receptacle cut the tab on the neutral side. If half of the receptacle has a neutral and the other half does not the the has to be cut. Only the tab on the hot side needs to be cut.
99% sure that tab is intact. Will check during the day, Monday, and verify with continuity test. Had swapped out outlets in case of a defect.
Sorry about double post, but thought I posted in wrong area, and could not find anyway to delete post.
Really not clear on the original outlet, which I think was half switched, but outlet in next room, the entire outlet was switched. Swapped out years ago improperly, and just did not use it. I screwed up and did not break tab.
This is USA, and original outlet was 2 prong.