Maker: Ero
I take the model name from the very simple impression on the point, although as the point may be unscrewed for replacement I may be far out in this. The pen is sort of a standard German pen, both in shape and method of filling. In terms of dating, I can establish it as a pen made in the 1980s thanks to a reminiscent Fountain Pen Network member, but can do no more. The mock-celluloid pattern on the barrel supports this dating, as there was something of a surge of interest in “retro” in that decade.
If you know more than I do, please let me know.
Production Run: In production in the 1980s, and may still be.
Cost When New: $50, according to a possibly faulty recollection (for modern value, try this calculator)
Size: 13.3 cm long capped, 14.5 cm posted, 12.2 cm uncapped.
Point: Plated steel. Like the Pelikans it looks much like, the point unscrews in a unit with the feed.
Body: Plastic, likely polystyrene but possibly ABS or even PVC.
Filler: Piston, capacity approx. 1.2 ml
If you are relying on the preceding information to win a bet or impress a teacher, you should read the site’s scholarly caveat. Remember, this is the internet, and it’s full of bad information.