Thanks very much dear Conrad,
wow, what an interesting find!
Strida meets talented model in company with skilled photographer 
Well; let’s look closer at that thing…no - check the outer tyre edges and their position relative to the locking latch and the frame bend rear, then compare with your own Strida.
Obviously the wheels are very large, indeed managed the Russians “somehow” to install 406er rims.
(Personal opinion: Contrary to most likely any other bike; on Strida it is NOT a big problem if the wheels are not exactly centered!)
That is in fact a unicorn…regarding the price I assume that the model is also included?
…and…just, unicorn-typical, it is maybe not so suitable for the real world?
It seems we have here the combination of a 100T beltwheel and an ATS speed drive which means:
- The first “lower” gear will be higher than any common single speed Strida.
- And the second, (much, much) higher gear will generate a development ratio which is beyond good and evil.
(Or, if you like numbers more - we are at ~ 8,40 m per crank rotation, good for 36 km/h…if you can pedal 90U/min)
Gear ratios information about different models of Strida