Swing razors come from Sweden. This "Sliding Lock" version is very seldom seen.
The TopCap is tightened by a twist mechanism which fits into cut outs in the blade posts which are in the topcap. As you twist the handle the edge of the round plate thickens and pulls the TopCap down.

When I first read about it, it was mentioned that it was adjustable so it went onto my list of razors to look out for.
Once I bought it, I went in search of the patent and after reading through the information, I see that "Quick Unlocking" was the intention of the inventor and not adjustability. That said - Blade Gap Adjustability is an uninteded consequence of the design.
The blade lies pretty flat and as a result adjustability is very limited.

Looking in the cap of the case, there is raised concave section that looks like a blade stropper. There is no mention anywhere that I can find of this, so if anyone has more info please contac me.
The blade wrapper is empty.

There seems to be another version which has a second row of notches, which would be for the drying of the blade without removing it. The US patent makes no mention of a second set of notches.

The US patent was granted to E.G. Tornkvist on November 3, 1931 under number US1830576

How does it shave?
I found that it's a pretty effecient shaver even with everything tightened up.
After this shave, I'm pretty certain that this was not meant to be adjustable. The adjustment that results from twisting the handle is not precise enough and repeatibility is an problem.