Wollensak 3-1/2 inch lens
I have a 3-1/2 inch (90mm) Wollensak lens on my (venerable!) Omega B-22XL enlarger. It is crosshatched with small, fine scratches in the coating, probably due to overly aggressive cleaning by one of its previous owners. Yet it delivers fine prints, at least up to 8x8-inches, from my 2-1/4 negs. It seems to be tad "flatter" than the 105mm Componon I have on my D-6, but there are so many variables to consider when comparing lenses, that there is no way to be certain.
Since I have no way of mounting the Wollensak on my D-6, nor the Componon on my B-22XL, printing the same negative on the two enlargers is more of a system test, but it would serve to provide a partial comparison of the two lenses. Frankly, I've never bothered, and enlargements from both negatives are sharp to the corners. If using the Wollensak requires a half-grade or a full grade more filtration, does it really matter that much?
Unless you are more interested in spending your darkroom time making tests, which in many cases are a dead-end proposition, leading to no useful information at all, just print with the lens at hand, and scope the results. In my case, I bought the Componon, and the Wollensak was a gift. I wouldn't have payed big bucks for it, but I was raised to not look a gift horse in the mouth (or a gift lens in the barrel...).
Some thirty years ago, I was a student at a large university, which offered a program of studies, leading to a bachelor's degree in one of the various photo disciplines. I had a part time job at the school, working in the department which issued equipment, including access to the darkrooms, to the students. The lens and carrier kits for the B&W darkrooms has three lenses in them, usually a 50mm, a 75- or 80mm and a 135- or 150mm lens, plus three negative carriers.
In some of the kits, the 50mm was replaced with a 2-inch Kodak Ektar, and some had the 75- or 80mm lenses replaced with a 3-inch Kodak Ektar. I do wish I had a dollar for every time one of the students, "in the know," sniffed at the Ektars and demanded one of the Componon lenses. Kodak made some of the finest lenses in the world under the Ektar brand name, the Commercial Ektars for large format as one example. I own, and still use, a single-coated 8-inch Ektar, mounted in a Supermatic shutter. This lens was manufactured in 1951, and I used it to make 4x5-inch colour transparencies, from which I cropped and made 11x14 dye transfer prints!
So don't let anybody jazz you; just because the "in" crowd doesn't use a lens, just because a lens was manufactured in the USA, that isn't the photo kiss of death. These people who promote such codswallop display their appalling lack of knowledge in not only photography and optics, but of history as well!
Here endeth the rant...