The saw was made for one year in 1961 (under a military contract). It pretty much fits between model 75G and 770G. It is an 82cc Reed ported gear drive that weighs a ton and is full of torque.
I would have to say that after running it, it is the most gear down saw I have ran. If it has .404, 7/16" or 1/2" chain I would definitely take the rakers down a couple thousandths; not to make it faster, but just to get it to cut well!! The saw looks great all military green with large dawg/felling spikes displayed. These saws give the gear whiz sound right along the Stihl 090G or Canadien 276 since they are a torqued up gear drive.
Mechanically it is built around the engine and can seem a bit much to work on, but it isn't as bad as it seems once it is back together! Worth the effort on any Remington gear drive!