Hi Leicashot & All,
Every single one of the original run of 300 chrome 35mm f1.2 lenses sold here in the States by Cameraquest (as far as I know) were made with the rear "shroud" modification already done for use with the M8/M9 to eliminate a slight focusing issue with those cameras. None of these lenses though had the 360 degree groove in the lens mount where one could hand code with a sharpie pen so it would pevent rubbing off with repeated mounting and dismounting. That feature (the groove) came later to both Zeiss and I believe CV lenses. Current Zeiss lenses and I believe many current CV lenses now have this grove. Whether another run of chrome 35mm f1.2 lenses were manufactured recently, but now including this rear groove for handcoating, I don't know.
A question: Leicashot, does your fairly recently purchased chrome 35mm f1.2 lens have this groove? If so, it would be the first chrome that I know of that has this, which would imply a new run of the chrome 35mm f1.2 lenses.
Dave (D&A)