Eversharp Silver-plated pencil, Made in England. It is a twist top screw / slider mechanism, i.e. you twist the top around and the mechanism pushes the lead out the tip. Thats one way - the lead doesn't go back in.
* some brassing
EVERSHARP, the inventor and first successful mass marketer of the mechanical pencil, goes back to 1915. WAHL was the brand name given to some of the finest fountain pens ever made and goes back to 1917. The hyphenated name WAHL-EVERSHARP first appeared on some of the finest “golden era” fountain pens in 1929.