I was go ing to say the Olympus OM1 or OM3 but had forgotten about the PenF,again from Olympus. I have just had a look at the Tessina and with a quick search can find little information about it apart from it did have a seperate viewfinder so is it an SLR?
The other one mentioned may be an SLR but appears to use 16mm film. This is an excerpt from Wikipaedia:=
The
Narciss is an all-metal 16 mm subminiature
single lens reflex camera made by Russian optic firm Krasnogorsky Mekhanichesky Zavod (
KMZ)
Narciss (Soviet Union;
Нарцисс) between 1961 and 1965. It is the first
subminiature SLR. It took 25 14×21 mm frames using unperforated specially spooled 16 mm film in a Narciss cassette. Compact design with interchangeable lenses and interchangeable pentaprism finders. The Narciss camera was initially designed for medical use, it included a Narciss with ordinary pentaprism finder and a second magnifier pentaprism finder for medical use; there was also a microscope adapter
[1][2][3]
It has a focal plane cloth shutter, with speeds B, 1⁄30, 1⁄2, 1⁄4, 1⁄8, 1⁄15, 1⁄60, 1⁄125, 1⁄250 and 1⁄500 sec. Change shutter speed only after shutter cocked
[4]
Dimension: 100 mm × 64 mm × 32 mm (3.9 in × 2.5 in × 1.3 in) – similar to the Rollei 35s in size)
Weight: 320 g (11 oz) – lighter than the Rollei 35s at 370 g (13 oz)
Tripod socket: 3⁄8 inch
The standard lens is a four-element three-group Tessar type lens: Vega 35 mm/2.8, there are also 5-element 4-group MIR5 28/2.8,MIR6 28/2, and JUPITER 50/2.
[5]
An early model of the Narciss is equipped with Industar-60 35 mm/2.8 lens.
Three models were available; the most common was the chrome-top black-body model, rarer was the chrome-top white-body model, and the extremely rare grey-top model.
[6][7][8][9]
Accessories: Genuine leather case, microscope adapter,
M24 lens mount to
M39 lens mount adapter for Zenit SLR lenses, with flange to film plane distance of 45.2 mm. M39 LTM mount with flange to film plane distance 28.8 mm not applicable.