It measures approximately 5&3/8 inches with the cap. I'm not a expert on foundation pens, and i attempted to describe it as well as possible. I haven't restored anything and cleaned the nib lightly. It is in working order as is, but.
A thorough cleaning would be best. Overall the condition is very good for its age. There are some minor scuffs and fine. No chips, cracks or dents.This item is made of great condition and rare, gold nib, black celluloid, sterling silver, vintage fountain pen, parker 51, classic 1940.