Originally Posted by
awac
Trying to identify the cups if you can not see the thread direction is a leap of faith when you press buy it online. If you can contribute photos, then maybe it will make it easier to find them. That keeps more Motobécanes on the road, and that makes me happy!
I have just scored lucky with these Shimano Swiss thread cups and 600 arabesque chainset. I was pretty sure from the photos, but the doubt was present! Some cups have “G” for gauche meaning left, these did not. They had “CH” (Switzerland) and “L”, er left? Notice the arms have “CH” on them as well.
CH in this case is a date code. Note the spindle, which is similar but not exactly the same vintage, has CG.
I don't know what the date codes mean (someone here does no doubt), but Shimano had two-letter date codes like this for decades. Maybe still do? I wouldn't know, I only buy vintage parts.
Funny coincidence, isn't it? That a Swiss-thread part would just happen to get the CH date code? Me like.
Mark B