This fanmade replica is a resin cast of an authentic Seiko Pulsemeter watch (worn by the Colonial Marines, on-screen). The same model (with some modifications) was used for the Wrist Locator that Corporal Hicks gave to Ellen Ripley, who in turn gave it to rescued colonist Rebecca Jorden (Newt).
Photos #4 & 5 show the Wrist Locator as seen on-screen.
