Both belong to the Classique series of Meisterstücks. The main difference lies in the cap construction: the 144 has a plug-on cap that wears out over time and leads to the cap unintentionally falling off; the 145, on the other hand, a screw cap; for this reason the 145 succeeded the 144. On the 144, additionally, the gilded ring between nib and grip section tends to corrode, and the body material is thinner and breaks more easily when dropped. The 145 is somewhat thicker, which many find more pleasant. For the final choice, however, the personal writing feel is decisive — the slim 144 appears too thin for some and leads to cramping during prolonged writing.