bill bokey

Hi all, I have this old mini HB : I have had it for years, can't even remember when (or why) I bought it but I never used it. I need to sell it but I would like to know what it is I'm selling. Based on the photos I found on google, it looks like an early mini HB with the patent number sticker but it has a grey plastic wire. Some late 60's PAF seem to have this kind of wire (not the usual braided one) but what about mini HB ? Any help and info would be greatly appreciated