Not a 100% but I think it was introduced in 1977.
And that this is the same camera as the Vivitar XC-3.

Technical info

Lens mount: M42
Shutter: 1/1000s to 4s + B
Light meter: Through the lens, center weighted (ISO 25 - 3200)
Battery: Two 1.5v SR44
Flash: Flash hot shoe + PC sync connection (sync 1/60 sec)
Weight: 540g

Self-timer
Mirror goes up first when the self-timer is used

Takes standard 135 film
24×36 mm negative size.



Viewfinder:

Great size and good brightness.
It works very well and the focus aid and the light meter is easy to use.

Info:
Top middle has the light meter info which is three led lights.
Two arrows at the sides and i green in the middle.

Focus aid:
Split screen and Microprism


Shutter type:

Focal plane
Horizontal traveling cloth curtain.

Electronically controlled.


Build quality:

All metal and it's good and solid!

Look, feel and sound:
Simple but I quite like the look.
It has a very nice solid and quality feel to it.
Buttons and dials also feel nice.
Shutter and mirror nois are okay, not the worst but I wouldn't call it quiet.



Usability:

A camera that have aged very well and is still a very usable one today.
Everything feel to be in its right place and it is logical how you operate it.
The light meter is sensitive and takes modern batteries.


Conclusion:

One of the better m42 SLRs.
It's small, lightweight and has a great viewfinder.
One nice plus is that the self-timer first brings up the mirror.
And a horizontal traveling cloth curtain makes very little vibrations which is great for long exposures.
Not many cameras with this type of shutter has that.

It also supports a exterior auto exposure accessory which you mount in the hot shoe.
This a very noisy and slow motor which turns the shutter dial for you.
Maybe a luxury in the late 70s but it looks quite funny with this thing on top.

I struggle to find any faults with this camera.


Thumbs up:
Great build quality and feel
Viewfinder
Light meter
Size and weight

Thumbs down: