A 144 with 18-carat gold nib speaks for an original; the model line is no longer in active assortment and is aimed at small, delicate hands. Strikingly low prices in the 150-euro range can be reputable but should trigger additional caution and check of nib, fittings and inscriptions. The Mozart by contrast is a still smaller note-writing instrument and not to be confused with the 144. On remaining doubts a comparison with gallery pictures or presentation in a boutique is recommended.