Upload & Sell: Off
It's the older type, all metal. The serial number is 57xxxxx so I think that makes it a later one (of the earlier type).
When you said you put it back together using live view to gauge the sharpness I guess you're not referring to setting infinity point? I did that via live view on a few lenses and then just tightened the screws and it worked. Do you mean in terms of setting the different glass elements?
I have often wondered if such things can be done, when one finds an old lens that doesn't behave as well as it should but there is no obvious issue with haze of fungus or scratches etc. Case in point was another 35mm Zeiss 1,4 (Contax AEG) lens I tested out a while back, it was in very good condition but obviously had some issue as at any distance beyond about ten feet it didn't behave like a well corrected lens but instead you could see when zoomed in in live view how optimum contrast and sharpness weren't quite meeting giving that veiling haze look that the Z* type has at f/1,4. It wasn't bad but I knew it should have been better: It was being offered at a bargain price and I thought to myself that, since I assume Zeiss wouldn't have sold glass that behaved like that, perhaps such a lens could be repaired if things had moved inside etc. Or have I misunderstood what you wrote?
In another forum I used to post on someone recommended a gentleman in Holland who repairs old Rollei lenses; I think I will contact him and see if it sounds an easy job to clean this lens as I am convinced now it is just some moisture or residue or something like that on an element and then if it is possible for a professional to do it, will see if the seller is happy to offer a big enough discount to make it worth my while! I tested it again last night and it giving a strange hazy sort of flare with street lights at night that I am pretty sure is down to this issue.
p.s. Merry Christmas! I wonder if it shows I have become too obsessed with photography that I still find myself clicking on photography forums today!