The pen is the rare 'specimen edition' owing to a very faint 'metal specimen' engraved of the barrel. In fact, I never noticed the engraving until I gently buffed the pen this morning getting it ready for sale.
I cannot represent to you that it is sterling silver because it doesn't have the hallmark. But, it looks and feels like sterling silver. The esparto patterning is beautifully done.
Although it is a heavy pen, it travels well inside a sport coat or suit jacket pocket. I've probably used it less than half a dozen times. But each time one of my partners saw it I could certainly see their eyes follow the pen when it was first brought out.
Some basic internet research found that at least one collector tested his metal specimen edition, revealing that the pen is solid sterling silver. (Sterling Silver Esparto)
It appears likely that a pen marked 'metal sample' would have been used as a dealer's display model, engraved by Parker to discourage sale, especially if Parker provided a display to the dealer without charge. This makes all the more sense, given that this is an expensive pen.
$1050, with free insured shipping within the United States. Sales outside US, please PM me.