I have 2 folders and rarely use this one. It is in very good condition. The bellows are light tight, the body is very clean, lens is clean and fungus-free. I recently tested the shutter speeds with an DIY shutter speed tester with the results attached.
These speeds will work well with B&W film which is usually very forgiving.
A 6x4.5 folder like this is about as compact as medium format will ever get. I've got a Daiichi Zenobia, so don't need this Zeiss, but if you like to be able to carry a medium format without needing a wide strap or a bag, this is a very good one to carry.
Like Don, I think it's pre-war. The shutter is almost certainly a Compur, probably with three blades. The lens is likely to be a triplet, because all Novar lenses I've seen were triplets. A reflection test on the rear element would determine whether it's a triplet or four element Tessar-clone.
Many triplets of that era were as good as the same age Tessar when stopped down a little -- for f/3.5 like this one, probably f/8 would make the Novar and Tessar indistinguishable on the film. In my experience, a pre-War Tessar is still good about one stop wider than the same speed triplet; otherwise, not much if any difference.
A 6x4.5 folder like this is about as compact as medium format will ever get. I've got a Daiichi Zenobia, so don't need this Zeiss, but if you like to be able to carry a medium format without needing a wide strap or a bag, this is a very good one to carry.
The camera is definitely pre world war II, the lens is a triplet, and the shutter is very reliable on these cameras. I've owned a lot of them over the years, they're sturdy and simple cameras and seldom need servicing. The Novar will give nice pics stopped down, the Tessar is more razor sharp and has a shutter w/ faster speeds. These really are amazingly small MF cameras, and you get a lot of pics on a roll of film. The lens on this one seems to be blooming nicely, so it may have a little more contrast.