I just noticed that the body of this TWOK medical device in the most recent Profile auction catalog, which is reminiscent of an otoscope.
Has the same body as the Lexarine injector from STIII, a prop I have long been interested in replicating.
- Hero illuminating Injector from Star Trek III: The Search for Spock. (Paramount TV, 1984) Tubular metal Injector with acrylic tip and applied silver graphic used by William Shatner "Admiral Kirk" to inject DeForest Kelley "Dr. McCoy" with "Lexarine," a drug to help counteract Spock's mind-meld with McCoy. Used when Kirk is breaking McCoy out of jail. The illuminating tip is activated by a switch on the handle. Measures 2 ½ in. x 5 in.
I seem to recall @racprops saying he was involved in the making of its sister instrument.
EDIT: This image of the two together indeed appears on his site.
Any idea what the original (presumably found) item was?