Can anyone that knows older lenses tell me about this lens, in terms of it's image making qualities assuming the glass is in excellent condition? I'd be interested in how well it performs in 12" with both elements and then in the 21" and 28" single cell configurations. The good thing is that the negatives made form it will be contact printed which will help a great deal. I know the Cooke Convertible lenses of its day were valued, but what about this lens?

Any info, especially from anyone that uses one, would be greatly appreciated.