Librem 5 devkit displaying phosh lockscreen with old layout. There's no top bar as on the current versions; instead, status icons are displayed below the clock and date in the middle of the screen. The background is black and there's "Slide up to unlock" with an arrow written at the bottom of the screen.
https://social.librem.one/system/media_attachments/files/014/359/658/original/cda22425a93dc015.jpeg