I'm slightly reluctant to ask this question as I ought to know better.
I have dismantled my 240mm G Claron for cleaning, but on reassembling the lens I found that one of the spacers within the lens elements has a lipped edge and the other is flat. When I took the lens apart I did not notice that they were different until it was too late, and now I'm not sure of the orientation of the lip edged washer. I believe it is probably placed nearer the shutter than the flat washer (but I'm now not 100% sure of this), but I don't know whether the lipped part faces the shutter or the front of the lens.
I know there are some folks on here who will know for sure. At present the lipped edge is facing the shutter with the back element sitting within it, however there is a little rattling noise if I shake the lens so I'm doubting now that even this is right.
Help !!!