This Compartment Case Model FB5 came with a camera set i've bought.
From initial research i've found out the FB5 would be suited to hold a F camera with F36 motor drive with cordless battery pack. After attempting to fit one in this dosn't seem to be the case and only the F with plain or photomic prism will fit.
The FB5 could be used for some more modern gear like an FM or F3.
These cases were very well made and rather expensive but one must be aware that they are not suited to keep gear locked up in them over a longer period of time as they seal moist wich could cause lenses to develop fungus.
The FB5 has Bayonet lens mounts,holds one camera and four lenses up to
300 mm though the "modern" 300mm 4.5 ED will not fit as it's a bit to long.
Three lenses are securely bayonetted to the lens mounts on the baseplate, and can be easily and quickly removed with one
hand, while the fourth is attached to the camera which is
fitted to the holder recess on the inner side of the case. Thepocket inside the case lid holds four filters, and two outside pockets provide additional space for sundries. The tilt-away front cover allows easy access to the contents. This is the case for those who require quick lens changes.
Here's a few photo's of what it looks like with vintage and some more recent gear loaded.
I first bought one of these in the mid-seventies. They were part of the extensive range of camera cases made by Nikon. It was the most practical case I ever had to carry a couple of bodies and lenses. Water ran off the vinyl and the case opened away from the body and provided a small working tray. Spiratone in the US copied them and had versions that took Nikon, Exakta and M42 screw mount lenses. Considering these days I use Lowepro and Pelican cases that good old FB5 still ranks as one the most practical cases I have used.