This is a Parker Duofold Vacumatic Senior in striped Maroon Laidtone celluloid, a combination of red, silver, and black strips, which are translucent in the barrel so the user can check the ink level. Senior models were also available in striped Blue and Green. This 5 1/4 inch long pen is date coded 1944. The Blue Diamond on the clip indicated Parker's "Life Guarantee Contract" against everything except loss or intentional damage. Note the V style unhallmarked gold nib. The plunger is the clear plastic type. They sold for $8.75 and the matching pencil was $4.00.