The Esterbrook 'J' double jewel series was made in three sizes the 'J', this pen, was the largest, the 'LJ' was about the same length but slimmer, and the 'SJ' was shorter.
Introduced in 1948, the earliest pens, such as this example, didn't have the 'R' registration symbol on the imprint.
The pen is finished in 'Pearl Grey', some batches were a darker colour, 'Dawn Grey', this is one of the brighter pens. It has an excellent surface with a unique mottled finish, no two Esterbrook J mottled pens are identical. The 'double grooved design of the clip is carried through to the cap band and the filler lever, all in good condition. It is a 'double jewelled' pen, with a black stud at the barrel and cap ends.
A new ink sac has been fitted, as the old one had hardened with age, and the pen has been serviced and tested. The nib is horizontally engraved 'Esterbrook 2668', Esterbrook listed the 2668 nib as 'firm medium-general writing', but I found it to give a beautifully smooth broad medium line, a really great writer. It would be well suited to someone with a large 'hand'.
At 13 cm. capped and a very impressive 15.8 cm. with the cap posted, this is a long and very well balanced pen with a satisfying solid feel. The stainless steel trim, thick celluloid, and excellent build quality make the Esterbrook J very practical and durable pen.