The pen is a Czar Nikolai I Vermeil Rollerball.
The model number is 22162, this model is based off of the Meisterstuck 162 "Le Grand" Rollerball.
The model number is 22163, this model is based off the Meisterstuck 163 Rollerball.
The Czar Nikolai series consisted of a large fountain pen (146-size piston filler), small fountain pen (144-size cartridge/converter filler), extra-small fountain pen (114 "Mozart"-size cartridge filler), ballpoint, rollerball and pencil models, in vermeil (gold plated over silver) and platinum plated over brass.
You have a very nice pen!
-- Joel -- "I collect expensive and time-consuming hobbies."
INK (noun): A villainous compound of tannogallate of iron, gum-arabic and water,
chiefly used to facilitate the infection of idiocy and promote intellectual crime.
(from The Devil's Dictionary
, by Ambrose Bierce)