The reverse side of the Blackwing, bearer of the famous slogan “Half the Pressure, Twice the Speed”, hasn’t changed as much as the labeling found on the obverse. But as you can see, there have been changes nonetheless. Once the two arrows were removed, all that was left was the phrase in all capital letters expressed in an oblique sans-serif typeface.
Other woodcase pencils have/had mottos or slogans associated with them. For example, the Noblot was billed as being “a bottle of ink in a pencil.” What are some other classic woodcase pencil slogans? If you’ve got one (or more), submit them so that they’ll be compiled in the comments section.