Zvezda are a Russianicon company that I believe have been around for a while not sure as far back as the 70's though.
Also from my books on the Tigers I learnt the Tiger II (Konigs Tiger) has 46 grouser treads and 46 spacer plates in each track so that's 92 links which works out to 38cm per track as I measured the rubber ones in the kit.

Sadly the quality has slipped with the metal links and I'm having to hand fit them filing and nipping over press tabs which stops the pin holes lining up correctly, frustrating you betchya!
I'm working under a magnifying light but small parts and gumby hands make for a not so restrained peaceful build I find and hour is my limit doing this bit then its time for reading up on the Tigers I'm onto the Tiger I & II combat tactics and crew training.