I'm trying to pin down, at least as accurately as possible, the date ranges of Uncle Henry boxes. I know the first ones were still in the brown hinged boxes, and around 1971-72 they switched to the two-piece brown boxes. Later ones had cream colored boxes with either black and red logos or blue and silver logos. Does anyone know the dates when the changes were made, and did the black and red precede the blue and silver? Thanks in advance!