Have a butcher's at this:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...A:IT&ih=007
I once thought the herringbone finish was iunique to vontage CS, then I found a silver pen with such a pattern made by Conklin (subject of a previous post).
Now I find, from this ad on the dreaded, that Parker also used the pattern and, from the style of the pen, rather earlier than CS.
Posted for interest; I'm sure this one will polish up nicely.
Greg