HP "PROFESSIONAL CALCULATORS" Backpack

[Dan Grelinger]

I can perhaps date it. The HP-41C was introduced in July of 1979. It was the flag bearer for the 41C series (actually the only one) until January of 1981, when the HP-41CV was introduced. After that date, HP promotional materials used images of both the -41C and -41CV, and would likely use the -41CV if just one image was used. So, this is likely from July of 1979 to December of 1980.