1940's Sheaffer's Triumph Tuckaway (More details in the comments). : r/fountainpens
PenHero 365: Sheaffer Triumph Sentinel DeLuxe Green
Vintage Sheaffer imperial touchdown II fountain Pen – Inlaid triumph conical steel M Nib and Grey Barrel, Made in Australia. * SOLD * – Authentic Vintage fountain pens – Used and NOS
Sheaffer Triumph Pen & Pencil Set (1940's) — The Vintage Nib