Braun Replacement Blade 504S for Series 5000

Found during a clean-out of my parents' home.

This is a rare, discontinued deadstock item.
It is unused, but has been stored at home for a long time as it is an old product.
Product Condition: The outer box and case have age-related scuffs and fading.
Blade Condition: As the item is unopened, the fine condition of the blade inside (e.g., presence of rust) has not been confirmed.
We ask that only those who understand the above points and that this is an old item purchase. Please refrain from purchasing if you are sensitive about such details.