VINTAGE 1930'S EVERSHARP FOUNTAIN PIN PLUNGER VACUUM FILLER DORIC ?

Description

HERE IS A NICE VINTAGE EVERSHARP FOUNTAIN PIN FROM THE 1930 'S- I DON'T KNOW MUCH ABOUT FOUNTAIN PINS-THIS WAS PART OF AN ESTATE PURCHASE FROM MY NEIGHBOR-I WAS AFRAID I MIGHT DAMAGE IT SO IT IS UNTESTED-APPEARS TO BE IN GOOD CONDITION WITH SOME G0LD  PLATE LOSS ON THE CLIP-NUB IS MARKED'' EVERSHARP SEMI-FLEX''-THANKS FOR LOOKING AND PLEASE EMAIL ANY QUESTIONS.
N0TE; I JUST FOUND THE MATCHING PIECE OF THE SET -THE MECHANICAL LEAD PENCIL -I HAVE LISTED IT SEPARATELY AND IT IS EBAY ITEM NUMBER 224519131396.SORRY FOR ANY CONFUSION.