This is a Sheaffer Crest Golden Brown lever-fill fountain pen c1937-1941. The 5 1/2 inch long Crest first appears on page 1 of the 1937 catalog as an unnamed model 47 new metal capped lever-fill pen with a visulated section offered with a gold filled cap in Black and Golden Brown Radite and a sterling silver cap with Gray Pearl Radite for $13.75. A matching pencil was $5.00. The Crest name appears in the 1938 catalog. A Vacuum-Fil model was introduced in the 1941 catalog. Note that unlike Balance models, this pen's cap and barrel fit flush with each other when the pen is closed and the section threads are at the end of the section near the nib.