Hi,
First of all, I'm not an expert on these pens. Living in the U.K., I don't come across that many of them!
However, one did turn up in a recent batch of items I bought - it is marked on the barrel Esterbrook with 'MADE IN ENGLAND' printed beneath. Looking at the Esterbrook website, it appears to be a J series Double Jewel but the clip is missing. Little surprised to find an English pen as I thought this was a N. American brand. Would be interested in more information - can anyone help?
The pen incidently is an attractive blue with darker bands - can post photos if anyone is interested.
G.