The fountain pen with an interchangeable semi flexible steel nib.

During the early 1930s the retailer Hazell Watson and Viney of 160 Shaftsbury Avenue London, were the agents selling the Esterbrook Relief pens within the United Kingdom. Coloured in streaks of dark and light pale blue and with a rhodium plated pocket clip, side lever and trim bands, a circa 1946 Esterbrook fountain pen.

The Esterbrook Relief nib has a broad left oblique point.

Ink filling is by side lever, a printed paper leaflet is available which shows details of how to fill the side lever filling models. An uncommon pen.