I just purchased a pair of one piece handles for my 250 SL (I have been pondering this for a long while). They show up and I try to install. Turns out the barrel (that fits into the top frame) is 2mm too large! Also, the barrel of the ones currently in the car have been ground down to have a bevel from front to year. The one-piece items that I purchased do not.
From what I have learned from checking the sizes on some friends cars here in SoCal, is that their one-piece and two-piece handles are all the same for the barrel diameter (26mm) and have the bevel ground in.
Are these from a 111/112 early version cabriolet??