I had this in a bucket of clears in the garage and saw that the mould had been used 18 years after the 1942 mould mfr date and was wondering what is the largest number of mould year dots found thus far on any insulator? This has 18 dots meaning that this specific mould had been used until 1960.Does anyone have any insulators with more dots? Please post to ICON. I find it interesting to see how many years the longest used mould was used. This is the tall CD 164 Hemingray-20.