"HHHHHH" variant courtesy Anonymous "No. 2" variant courtesy Allan Macdonald collection

This pencil is similar to, if not the first drafting leadholder. The long-lead leadholder was introduced by A.W. Faber in 1861. See the History section.

The imprint reads: "A.W. Faber Germany HH." (reverse) The imprint reads: "Graphite De Siberie De La Mine Alibert No. 4."

A double ended A.W. Faber Siberian Graphite Artists' Pencil.
The imprint reads: “F   No. 3   A.W. FABER   Made in Germany   No. 4   HH.”

The imprint on the reverse of the single ended pencil refers to the Siberian graphite deposits discovered and mined by Jean-Pierre Alibert in 1847.  A.W. Faber secured an exclusive deal with Alibert becoming the only pencil manufacturer to have access to the Siberian graphite, which was said to be as good as the original graphite deposits found in Cumberland, England, but by 1847 the English mines were nearly exhausted.

Curiously, in place of graphite lead the single ended holder had a metal blade of sorts when found. It was apparently used for engraving. I have no idea if this use follows A.W. Faber's officially sanctioned leadholder usage specifications, but it’s a history that is certainly unique among the pencils in my collection.