The 146 was reintroduced in 1974 and has been built in several variants since. A simplified overview from observation: 1973–1979 blue-grey ink window, ebonite feed, single-tone gold nib, "Germany"; 1980–1984 same configuration with "W. Germany"; from 1985 additionally a brass piston mechanism; from c. 1987 bicolour nib while keeping the blue-grey window and ebonite feed, with serial number (two letters + six digits); from c. 1988 a new T-shaped plastic feed; from 1990 a striped ink window; from 1994 without the Pix symbol. Bicolour nibs with blue windows therefore also occur from the factory in a transition phase, not only through later nib swaps in service. Later 146s are slightly longer and bear the addition "LeGrand". The cap can read "Montblanc – Meisterstück No 146", "Montblanc – Meisterstück" or with the addition "Pix", depending on the variant.
Related pages on fountainpen.de:
• Montblanc Meisterstück 146 (Le Grand): https://www.fountainpen.de/c-montblanc-meisterstueck-146-en.htm