This will be a brief post, but may prove helpful to someone looking for pens or pencils to match their Silver Imperial.
We've noticed two different shapes for the diamond grid pattern on the Sheaffer Silver Imperials which were introduced in the late 1960s. The first version has diamond grids that are like squares turned on their sides, and matched the touchdown version of the Silver Imperial fountain pen, whereas the other version has the diamond grids in a more elongated shape and went with the cartridge/converter version of the Silver Imperial.
You should look carefully at photos if you are trying to get a pencil to match your ballpoint or fountain pen. We show a comparison photo above.
TOUCHDOWN FOUNTAIN PEN:
CARTRIDGE CONVERTER FOUNTAIN PEN: