http://navigator.rafmuseum.org/results.do?view=enlarged&db=object&pageSize=1&id=145311

As usual someone has knocked out the dividers in the box but you can see the outline of the square compartments for the film rolls on the right hand side. This is the first Canada Astrograph box I have seen, thanks for posting. The only astrograph parts I can see in the photo are the film roll and the film can. The US Sperti ones are deeper and have the film rolls in a compartment in the bottom of the box.

The film is nitrate type and needs to be conserved carefully. I did enquire about copying them onto safety film but as it has no sprocket holes I couldn’t find anyone to do it.

This article gives a nice description of the whole setup.

http://www.flightglobal.com/pdfarchive/view/1943/1943%20-%202374.html

One thing I have never been able to understand is how incredibly dim the projection from an Astrograph appears – needs to be viewed in pitch blackness.