Just as a reminder, those so-called "Transitional" toolboxes with dual-marked stickers might could be as early as mid- to late-1948. They would not have dual-marked tools in them yet, but Plomb was granted the PRVTV TM in July 1948 and it was explicitly registered for packaging, decals stickers, etc. They started the PRVTV BY PLVMB ad campaign in October 1948 expressly thinking that plastering everything external with the new PRVTV name would assuage Fayette R. Plumb nd they wouldn't have to change dies. It did not work. They were sued, again, in December 1948, and two weeks later, they applied for a different PRVTV TM, this time saying it would be used on tools, too. Their last ditch (and it has to be said, stubborn) plan to keep the PLVMB name on tools, with the dual-marked initiative, was launched in January 1949, and they were promptly sued, and lost, for the last time. So, tools, almost certainly 1949 only. Stickers and other paper versions of the dual TM could be mid to late 1948.