Recent mechanical pencil acquisitions. From left to right: Edward Todd, Eversharp, Omas, and Parker. Circa 1930's and 40's. The Edward Todd is much earlier.  Also, an Italian Fulgens branded pencil snuck into the Omas's in position 7th from the left.

Showing is a Sampson Mordan double-ended silver cedar holder(s). The color-coded collar sliders are blue and red. Finding proper wooden refills in those colors was probably always difficult. The outer pattern is called cable twist The piece dates to the end of the 19th century Body is 4 inches in length.