Eumig has the following spec:
Small, very easy to operate and of course battery driven. When the film is near ending, the red light in the view finder will light up. This is the very same light when as you push the "BAT" button to test the batteries.
This camera was also sold under the Bolex brand name as "Bolex 233 Compact".
Specifications
Manufacturor : Eumig
Model : MINI 3 Servofocus
Type : Super-8 film camera
Produced : 1974
K.D. Müller Reference :
Film : super-8 cassette
Picture size : super-8
Made in : Austria
Quantity Made : 150 000
Original List Price :
Material : Metal and sturdy plastic
Lens : Eumig Vario-Viennon 1,9/9-30 Multicoated made in Austria
Filter size : 36 mm
Focusing : fixed
Focus range : 0,4 meter - infinity
Viewfinder : view finder with exposure meter and warning light
Speed : 18 frames per second and single frame
Aperture : 1,9
Exposure : Auto
Exposure meter : Low light level warning indicator
Winding : Electrical
Battery : 2x standard AA battery in the film compartment
Film spot contact : none
Other :
Dimensions : 180 x 47 x 80 mm excluding handle (l x w x h)
180 x 47 x 145 mm including handle
Weight : ~ 540 grams
GAF 714
marketed in 1976
silent super 8 cartridge
lens: Xytar Zoom f: 1.8 \ F: 9-36 mm
zooming ratio: 4x
focusing: manual
rangefinder: ?
zooming: auto and manual
filter size: ?
viewfinder: single-lens reflex with adjustable eyepiece
viewfinder information: ?
exposure: auto exposure control; TTL EE, CdS cell
film speed: auto for 25/40 and 100/160 ASA only (daylight/tungsten)
filter: built-in 85A filter, coupled with movie light socket
filming speed: 18 fps, single frame
shutter opening angle <180 degrees
sound: no
remote control socket: yes
cable release socket: no
movie light socket: screw type
film counter: yes
handle: detachable
battery check button: yes
film drive motor: DC micromotor
power source: 4 x AA batteries
weight: <1000 g
weight: circa 70 x 190 x 205 mm
tripod socket: 1/4"
made in Japan by Kohka
So the GAF is the later unit, but the Eumig looks like it comes with the PMA lens, which is an asperical wide angle attachment that you screw on the main lens. (Useful for interior work)
Both very similar spec otherwise - you'd want to check battery compartments for corrosion, and of course check basic function when powered up.