No mould, fungi or stiffness.
No loss or gain of colors.
No cellular damage to leather, and even of rubbers, if the rubbers came from Hermes, LV, Bally and a few of the higehenders.
I have a 1966 and a 1967 Birkin which is in MINT condition, 50cm and 60cm.
I have a Bally and a Mephisto from between 1976 to 1980...shoes..still using weekly.
Better than a few watches I own.
Hmmmm...