Is a Montblanc Solitaire Vermeil ballpoint with clip inscription only "GERMANY" without serial number genuine, and what price is reasonable for the matching set?

On older writing instruments, only "Germany" is engraved; a laser engraving with serial number was only added later, so the absence of the serial number does not speak against authenticity. Solitaire sets of this kind are typically to be assigned to the 1980s. A price of 150 to 200 euros for the gold-plated 144 fountain pen alone is a clear bargain, since realistic market prices are rather around 240 to 280 euros. The 144, however, is for many too thin for prolonged writing and is more suitable for signatures; the collectability of a set is determined by the original packaging and impeccable condition (no dents, engravings or scratches).