Well, I have decided to catalog the CD numbers on my insulators (using a label maker) as a hands-on identification thing, but I realised that the one in the photo above, on the right, is not the same as the one on the left. I thought they were both CD 102, made by 'Star', but the rightmost one is taller, has a more bulbous head, and has an angled skirt unlike its neighbouring mate. What CD is it?
The same goes to the following pair. I thought they were CD 112, but one is bigger, with more of a rounded bulge, than the more square-bulged shorter one on the right. What CD are they? Different? Same? In both cases it is Star that throws me off. I know differences are expected to exist between manufacturers, but these ones caught my eye.
Thank you for any help you can give, and have a great day.