As far as im aware Jonesy the straight bar really only came on very early autos. Remember the small hex end of the spanner wasnt just for the height adjust bolt, it was originally designed to relax and adjust the handle bars and skirt bolts while the other was obviously for the plug. The use of the larger nut on the height adjust was for extra load tension to lock the adjust whell nice and tight so they didnt have to tool up a whole new spanner with a 1/4 end...the curved ends were really made to stop people losing the bar:) but your dead right gaz's serial is correct for the bent ended spanner. Preferably I find the straight bar better as its easier to turn the height adjust wheel. This handle apart from the obvious of mounting the spanner and removing the nuts was actually written in an advert for "ease of use for women" to operate the height adjust! Lols
