I have a Beolit 707 with anodized black control panel, which has been a possession of my grandparents. It was always placed in a window where the sun always shines. After 25+ years, the anodized black almost disappeared and the letters became quite faint. Exposure to sunlight can simply ruin the anodized panel and lettering...
-Søren
Beocenter 9300, Beogam CD50, Beocord 5500, Beomaster 3400, Beomaster 4400, 2 Beogram 4000, Beomaster 8000, 2 beogram 8002, Beovox S-75, Beovox MS150.2, Beovox RL6000, Beovox S-35, Beomaster 6000, 2 Beocord 9000, Beocord 8004, Beocord 5000, Form 1, 2x Beolink 1000, Beo4, MX3500, LS4500. Born 1993.