From https://www.filmkorn.org/super8data/database/cameras_list/cameras_eumig/eumig_mini3.htm:

Eumig Mini 3 Zoom Reflex

•     marketed in 1972
•     silent super 8 cartridge
•     lens: Eumig Vario-Viennon f: 1.9 \ F: 9-28 mm
•     zooming ratio: 3.3x
•     focusing: fixed (1)
•     zooming: manual
•     filter size: ?
•     viewfinder: single-lens reflex with adjustable eyepiece: +/- 3 diopters
•     viewfinder information: under-exposure warning signal, film transport indicator
•     exposure: fully automatic exposure control; not TTL EE, CdS cell
•     film speed: auto for 25/40 and 100/160 ASA (daylight/tungsten)
•     backlight control: + 1 f/stop
•     CCA filter: built-in 85A filter, coupled with movie light socket
•     shutter: 190 degrees
•     filming speed: 18 fps, single frame
•     sound: no
•     remote control socket: no
•     2 cable release sockets: single frame, continuous running
•     movie light socket: kodak type, with filter key
•     film counter: yes
•     handle: detachable
•     battery check button: no
•     film drive motor: DC micromotor
•     power source: 2 x AA batteries
•     weight: 450 g
•     dimensions: 34 x 77 x 142 mm
•     tripod socket: 1/4"
•     made in Austria by Eumig

Condition: Good; Untested