This is a Parker Sac Duofold pen in striped Blue Laidtone celluloid, a combination of blue, silver, and black strips. Sac Duofold models were also available in striped Maroon, striped Green, and Black. This 5 1/16 inch long pen is date coded 1941. The pen barrel is stamped GEO. S. PARKER – PARKER – MADE IN U.S.A. next to 1. The gold nib is stamped PARKER over PEN over MADE IN over U. S. A. It’s a button filler, that fills by removing the black cap at the barrel end and pressing the button with the nib in ink. Parker called the ink view section the “Viso-meter.” They sold for $2.95 and the matching pencil was $2.00. #pencollecting #fountainpen #parker #parkerpen #duofold #parkerduofold #celluloid #laidtone #penhero https://www.instagram.com/p/CULje1VvUwN/?utm_medium=tumblr








