A returning TouchOfModern favorite, the CW&T Pen Type-A is beautiful in its engineering and practicality. It's a minimal design with all its parts machined out of solid stainless steel, which lends a great weight to the final product. The chamfered edges of the pen let it slide gracefully into its precision-fit sleeve. The sleeve can be used as a straightedge and has laser etched ruler markings.
The CW&T Pen Type-A is a great gift for architects, engineers, or just appreciators of precision and fine construction. It's available on TouchOfModern for another 20 hours (from the time of this email).