Berdar,
I purchase my porte crayons from Goosebay Workshops
http://www.goosebay-workshops.com/WRITING-IMPLEMENTS. Some of what we know of early American colonial history (including sketches, illustrations) has been communicated by the use of the porte crayon. It works as good today as it did then for those very active early outdoorsmen. Fits right in with that brass matchcase and brass compass, too
PORTE-CRAYON (above)
Handmade by Peter Goebel. Historic reproduction. We know these as mechanical pencils. They are simply holders for leads. They are great for sketching, or writing in the field when you don't want to mess with ink & quills. Leads can be inserted into both ends. A ring slides down to tighten the metal around the leads.Two period leads are included, extras are sold below. We offer the porte-crayon in three sizes. (The smallest fits the Weskit and Traveling ink wells and holds one lead.
Dated: ca. 1750. Origin: French/English. Materials: brass.
This writing and drawing instrument was first recorded in use during the Renaissance and has been in continuous use ever since. It consists of a brass tube with compression rings on either end which tightly hold sharpened pieces of graphite. This is a very handy instrument for note keeping in the field. It was used in the past by journalists, tradesmen, engineers (it easily marks on wood and rock) and artists. Conti chalk can be substituted by you for the graphite if you would like to add color to your sketches. (Conti is available through many art supply stores.)