Any idea as to the year? I have about 7 of these. (used to have 12 when I bought them at a goodwill back in Florida., but some went over those years) There's no barcode label on them, which leads me to believe that these bulbs are either from the 1960s, or somewhere into the early 1970s. Aside from the goodwill price sticker for 29 cents. there's a white oval sticker on top of the box, pricing it at 75 cents.