This is the Nye-Viking MB-V-A 3KW manual tuner.
After trying many various tuners, (MFJ, Johnson)
I decided to invest the money and buy this tuner.
Before buying, I did a lot of research and checked many reviews.
It was hard to find a negative review of this tuner.
It is my humble opinion, that this is one of the best manual tuners available to HAM operators.
While there are many automatic tuners capable of handling 3 kilowatts,
there aren't very many manual tuners that will reliably handle that much power.