Inheriting a bag of mystery camera gear

Some of my friends have inherited some interesting camera gear and apparently I’m about to receive my very own bag of mystery equipment. All I know is it is supposedly a small backpack filled with high end pre-digital photo gear. I’m curious what all that means since my interpretation of things could be a lot different from how a non-photographer would view things. An inventory and photos of the collection will come as soon as I have received it and had a chance to check it out. No clue what I’ll do with all of it until I know what it is but apparently nobody else in the family would be able to properly appreciate the gear as it sits on a shelf collecting dust so I’m getting all of it.