This is the last & among the best of the pieces from that same box of insulators from the fellow in his junk shop. It's a [020] B.T.C. CD 121 in a sort of steel blue shade, but with dainty purple swirling through out, so that it's overall colour appears somewhat of a washed out grayish lavender. Even dirty, the piece really stood out in the box! Apparently the owner didn't care, though, and still gave us the whole box for an irrationally low price! My dad insisted on paying more, and gave twice what he asked, at a grand total sum of $10 for 20 insulators!