The very Art Deco styling of this razor screams the early 1930's. It has a weird shaped guard, sort of a cage with a guard. I'm not sure what its purpose was but it does look pretty awesome. It feels extremely well made, which would be par for the course with British manufacturing at the time. The W.J Myatt company were silversmiths based in Burningham, UK.

This is another one of those that while adjusting the blade acts as the spring and tensions itself.
I don't have an original blade and believe that the blades were thicker and thus had more spring in them. It's not really an adjustable using todays blades, nonetheless it's marked with FINE, MEDIUM and COARSE on the handle and has a little arrow on each side of the twist knob.

The pins are unusual so it takes a proprietary blade. Reading on the net, some guys force the blade onto the pins, which I guess would work OK were it not using the spring in the blade as it's tensioner.
I did some careful measuring, a bit of lining up and "deep" engraved a blade blade to fit the pins.

Its a three piece. The handle and head can be separated as well. I believe this to be for manufacturing purposes, but instead of crimping them they decided that they would be screwed together. This one has been well used and at some time in its life it must have been dropped because one of the end teeth is very slightly bent. This doesn't affect the shave at all.