A pilot's scarf and a propeller are not the same kind of securing. One is textile and a badge, the other an object that falls over. In the overview Security for collectors you split the holdings before you buy a cabinet.

Small

Badges, watches, logbooks. The watch follows the text on wristwatches, the badge the one on orders, the logbook follows paper: dark, dry, in the document cabinet if it is rare. Military marks you are unsure about, you clarify before you show them.

Large

Propellers, instrument panels, a seat. Free of knocks, dry, not in the damp shed, labeled on the list so an instrument does not lie "somewhere." An instrument with glass follows the rule for scientific instruments: do not take it apart yourself.

The folder

Every small piece one line, the large parts with measurements and a photo. Origin, as far as you can document it. It is not invented.