I have an old bantam 200 that needs cleaned/lubed.  It's old enough that I'm not sure where to find a parts schematic.  I'm a little scared to open it up as I don't want random parts falling out.  Any tips on cleaning/lubing these older reels?

A beauty of a reel.

You might find it here..

https://www.reelschematic.com/reel-schematics/shimano-reel-schematics/shimano-bantam-schematics/#gsc.tab=0

Send it to one of the sponsors on here, Delaware Valley Tackle and you will get it back in primo condition. 

Not to step on DVTs toes, but I've done a few of these and they aren't very difficult. When you take off one of the sides--lift up so that parts can't fall out. Set your phone up to video and or take pictures. Those old Shimanos don't have a zillion parts, you'll be fine.