That's what it is! I saw one of these in a country antiques store (Dunolly, Victoria), battered, worn, faded and having seen much service, origin unknown and with a name that was unreasable but looked Cyrillic to me (having seen this post, it is a Russian job). I would suggest now diversifying in equipment and skills and upgrading to a spot/incident/reflective meter. The amount you would need to learn, to understand, would be considerable initially, but with experience you will be turning out exposures that are bang-on perfect, with no loss of detail or muggy shadows — but you have to learn how to do this.