Hi all - would appreciate some help identifying a breather which I recently acquired in a job lot of parts. The one with a straight down tube (RH one in first photo) is the usual 4 pot one , TR2-4 as far as I know, but what is the other one from with a curved downtube ( LH one in first photo)? ( yet again the second photo has been inverted when I downloaded it from my photo library and I have no idea why it's doing this!). The "curved" one doesn't appear to been modified from a straigh