The release was exactly where they found it. On the LTM Leicas.
The "new" F will go into some collectors cabinet or safe deposit box only to be massaged once & again on important occasions. Probably in smoking jacket and with a snifter of brandy(the owner not the camera).
Rather than new, it's probably a camera bought & stored for years and technically is used since a new camera would have been bought from the distributor shortly after manufacture.