The original black version of the body bears a strong resemblance to the Argus A. Later Spartus "35" models from Herold Products switched to a gray & silver body style somewhat reminiscent of the Kodak Pony.
Their bodies is Bakelite.
There are many different lens & shutter combinations of the Spartus 35 and 35 F.
The most expensive model offering an f/3.5 coated anastigmat lens, four shutter speeds from 1/25 to 1/150 sec. plus T and B.
But, commonly the cameras have a simple manual scale focus, one speed shutter (Inst 1/50 / Time) and 50mm f/6.3 (or f/7.7) lens with apertures f/6.3-7.7-11-16.
Also,there were many cosmetic variations of the body during its manufacturing period.
The "F" designation indicated a top flash sync connector bolts on the top plate. Late Spartus 35 models also have connector holes or bolts for dedicated bulb flash units on the top.
This data belongs to the camera c.1954 in the photos
Lens: 50mm f/6.3 filter slip-on
Aperture:(no scale or ring on the lens), setting: rotating plate with 4 holes corresponding the aperture numbers f/6.3-7.7-11-16, by wheel under the lens-shutter barrel, markings on it: cloudy, hazy, bright, dull
Focus range: 4-20 feet +inf
Focusing:manual front focusing, guess the distance
Shutter: Simple spring rotary shutter, one speed, Instant (1/50) +T (B), setting lever on the shutter
Cocking lever and Shutter release: by the same lever, for instant press once and release, on the lens-shutter barrel
Frame counter: on the top plate, manual setting, not works wo/film in the camera
Winding knob: on the top plate, double exposure prevention
Viewfinder: reverse telescopic finder, in the top housing
Re-wind knob: on the top plate
Re-wind release: knob on the back cover
Flash:Dedicated Spartus bulb flash unit, fits to the two holes on the the top plate
Flash PC socket: none
Back cover: removable, opens by a latch on it
Tripod socket: 1/4"
Body: Bakelite; Weight: 408g w/flash unit
Spartus "35" Herold c.1954 w/ dedicated flash unit