The Meisterstück 149 has been produced since 1952 in nearly unchanged form with yellow-gold trim and is regarded as a classic standard model, which is why Montblanc holds on to yellow gold for traditional reasons. The Artisan Atelier of Montblanc, however, makes special productions with individual wishes like platinum-plated trim, provided they do not deviate too strongly from the model line, although at very high prices. The selection of nib widths is by now reduced at Montblanc; Aurora is regarded as a brand with particularly broad nib range from OFR to OBBR. Tastes in trim differ: younger buyers feel yellow gold partly to be old-fashioned, while white trim appears more modern.
Related pages on fountainpen.de:
• Montblanc Meisterstück 149 (Grand Format): https://www.fountainpen.de/c-montblanc-meisterstueck-149-en.htm